question #3 Sahih Muslim 199a, Book 1, Hadith 397 : What conditions must be met for a member of the Ummah to benefit from the Prophet’s intercession according to Islamic teachings?

The Prophet of Allah (ﷺ) said: There is for every apostle a prayer which is granted, but every prophet showed haste in his prayer. I have, however, reserved my prayer for the intercession of my Ummah on the Day of Resurrection, and it would be granted, if Allah so willed, in case of everyone amongst my Ummah provided he dies without associating anything with Allah.