question #1 Sahih Muslim 199c, Book 1, Hadith 399 : What is the significance of the Prophet’s choice to defer his prayer for intercession for his Ummah?

The Messenger of Allah (ﷺ) said: There was for every apostle a prayer with which he prayed for his Ummah and it was granted to him; but I wish, if Allah so wills, to defer my prayer for the intercession of my Ummah on the Day of Resurrection.