Muhammad talks about intercession in his Koran. What is it about?
Intercede
Allāh – there is no deity except Him, the Ever-Living, the Self-Sustaining.
Neither drowsiness overtakes Him nor sleep.
To Him belongs whatever is in the heavens and whatever is on the earth.
Who is it that can intercede with Him except by His permission?
He knows what is [presently] before them and what will be after them, and they encompass not a thing of His knowledge except for what He wills.
His Kursī extends over the heavens and the earth, and their preservation tires Him not.
And He is the Most High, the Most Great.
Koran 2:255
Whoever intercedes for a good cause will have a share [i.e., reward] therefrom; and whoever intercedes for an evil cause will have a portion [i.e., burden] therefrom.
And ever is Allāh, over all things, a Keeper.
Koran 4:85
Do they await except its result?
The Day its result comes, those who had ignored it before will say, “The messengers of our Lord had come with the truth, so are there [now] any intercessors to intercede for us or could we be sent back to do other than what we used to do?”
They will have lost themselves, and lost from them is what they used to invent.
Koran 7:53
He knows what is [presently] before them and what will be after them, and they cannot intercede except on behalf of one whom He approves.
And they, from fear of Him, are apprehensive.
Koran 21:28
Intercession
And fear a Day when no soul will suffice for another soul at all, nor will intercession be accepted from it, nor will compensation be taken from it, nor will they be aided.
Koran 2:48
And fear a Day when no soul will suffice for another soul at all, and no compensation will be accepted from it, nor will any intercession benefit it, nor will they be aided.
Koran 2:123
O you who have believed, spend from that which We have provided for you before there comes a Day in which there is no exchange [i.e., ransom] and no friendship and no intercession.
And the disbelievers – they are the wrongdoers.
Koran 2:254
None will have [power of] intercession except he who had taken from the Most Merciful a covenant.
Koran 19:87
That Day, no intercession will benefit except [that of] one to whom the Most Merciful has given permission and has accepted his word.
Koran 20:109
And intercession does not benefit with Him except for one whom He permits.
[And those wait] until, when terror is removed from their hearts, they will say [to one another], “What has your Lord said?”
They will say, “The truth.”
And He is the Most High, the Grand.
Koran 34:23
Should I take other than Him [false] deities [while], if the Most Merciful intends for me some adversity, their intercession will not avail me at all, nor can they save me?
Koran 36:23
Say, “To Allāh belongs [the right to allow] intercession entirely. To Him belongs the dominion of the heavens and the earth. Then to Him you will be returned.”
Koran 39:44
And those they invoke besides Him do not possess [power of] intercession; but only those who testify to the truth [can benefit], and they know.
Koran 43:86
And how many angels there are in the heavens whose intercession will not avail at all except [only] after Allāh has permitted [it] to whom He wills and approves.
Koran 53:26
So there will not benefit them the intercession of [any] intercessors.
Koran 74:48
Intercessors
[It will be said to them], “And you have certainly come to Us alone [i.e., individually] as We created you the first time, and you have left whatever We bestowed upon you behind you. And We do not see with you your ‘intercessors’ which you claimed that they were among you associates [of Allāh]. It has [all] been severed between you, and lost from you is what you used to claim.”
Koran 6:94
Do they await except its result?
The Day its result comes, those who had ignored it before will say, “The messengers of our Lord had come with the truth, so are there [now] any intercessors to intercede for us or could we be sent back to do other than what we used to do?”
They will have lost themselves, and lost from them is what they used to invent.
Koran 7:53
And they worship other than Allāh that which neither harms them nor benefits them, and they say, “These are our intercessors with Allāh.”
Say, “Do you inform Allāh of something He does not know in the heavens or on the earth?”
Exalted is He and high above what they associate with Him.
Koran 10:18
26:91 And Hellfire will be brought forth for the deviators, 92 And it will be said to them, “Where are those you used to worship 93 Other than Allāh? Can they help you or help themselves?”
94 So they will be overturned into it [i.e., Hellfire], they and the deviators 95 And the soldiers of Iblees, all together.
96 They will say while they dispute therein, 97 “By Allāh, we were indeed in manifest error 98 When we equated you with the Lord of the worlds. 99 And no one misguided us except the criminals. 100 So now we have no intercessors 101 And not a devoted friend.
Koran 26:91-101
And there will not be for them among their [alleged] partners any intercessors, and they will [then] be disbelievers in their partners.
Koran 30:13
Or have they taken other than Allāh as intercessors?
Say, “Even though they do not possess [power over] anything, nor do they reason?”
Koran 39:43
So there will not benefit them the intercession of [any] intercessors.
Koran 74:48
Intercessor
And warn by it [i.e., the Qur’ān] those who fear that they will be gathered before their Lord – for them besides Him will be no protector and no intercessor – that they might become righteous.
Koran 6:51
And leave those who take their religion as amusement and diversion and whom the worldly life has deluded.
But remind with it [i.e., the Qur’ān], lest a soul be given up to destruction for what it earned; it will have other than Allāh no protector and no intercessor.
And if it should offer every compensation, it would not be taken from it [i.e., that soul].
Those are the ones who are given to destruction for what they have earned.
For them will be a drink of scalding water and a painful punishment because they used to disbelieve.
Koran 6:70
Indeed, your Lord is Allāh, who created the heavens and the earth in six days and then established Himself above the Throne, arranging the matter [of His creation].
There is no intercessor except after His permission.
That is Allāh, your Lord, so worship Him. Then will you not remember?
Koran 10:3
It is Allāh who created the heavens and the earth and whatever is between them in six days; then He established Himself above the Throne.
You have not besides Him any protector or any intercessor; so will you not be reminded?
Koran 32:4
And warn them, [O Muḥammad], of the Approaching Day, when hearts are at the throats, filled [with distress].
For the wrongdoers there will be no devoted friend and no intercessor [who is] obeyed.
Koran 40:18
Of course, nothing happened. Muhammad’s repetition condemns him, as it contradicts the oneness of Allah. Muhammad was a liar and a false prophet.
The Bridge
About the bridge from Earth to Heaven, the intercessor is Jesus:
Very truly I tell you, whoever hears my word and believes him who sent me has eternal life and will not be judged but has crossed over from death to life.
Jesus, NIV John 5:24
Muhammad was a false prophet, for a false god, Allah, for a false religion, Islam, without even a false book, the Koran.
Koran Contradiction 