A ---The greatest one is:

(1) the Great Intercession on the Day of Judgment, the Day of Reckoning. This is a specialty granted to Prophet Muhammad (Peace be upon him). It is the Maqam Mahmud (a station of praise and glory) that is promised by Allah the Almighty in His Statement, {It may be that your Lord will raise you to Maqam Mahmud (a station of praise and glory, i.e. the honor of intercession on the Day of Resurrection)}. (Al-Isra', 79)

That when Allah will gather the believers on the Day of Resurrection in the same way (as they are gathered in this life), and they will say, 'Let us ask someone to intercede for us with our Lord that He may relieve us from this place of ours.' Then they will go to Adam, Nuh (Noah), Ibrahim (Abraham), Musa (Moses), ('Isa) Jesus, and finally Muhammad and say, 'Don't you see the people (people's condition)?' all of them would say, 'I am not fit for this undertaking', save Muhammad who would say, "I am fit for this undertaking ". (Bukhari and Muslim)

(2) Intercession for opening the gate of Paradise. The first to enter therefrom is Prophet Muhammad (Peace be upon him), and the first Ummah (community or nation) to enter it is his Ummah.

(3) Intercession for the benefit of some people who are ordered to be admitted into Hell, not to enter it.

(4) Intercession for the benefit of some monotheists who were admitted into Hell to get out from it.