كتاب الإيمان
1  
The Book of Faith
(86)
Chapter: The Prophet (saws) will defer his supplication in order to intercede for his ummah
(86)
باب اخْتِبَاءِ النَّبِيِّ صلى الله عليه وسلم دَعْوَةَ الشَّفَاعَةِ لأُمَّتِهِ ‏‏
Sahih Muslim 199 c

Abu Huraira reported:

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.
حَدَّثَنَا عُبَيْدُ اللَّهِ بْنُ مُعَاذٍ الْعَنْبَرِيُّ، حَدَّثَنَا أَبِي، حَدَّثَنَا شُعْبَةُ، عَنْ مُحَمَّدٍ، - وَهُوَ ابْنُ زِيَادٍ - قَالَ سَمِعْتُ أَبَا هُرَيْرَةَ، يَقُولُ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏ "‏ لِكُلِّ نَبِيٍّ دَعْوَةٌ دَعَا بِهَا فِي أُمَّتِهِ فَاسْتُجِيبَ لَهُ وَإِنِّي أُرِيدُ إِنْ شَاءَ اللَّهُ أَنْ أُؤَخِّرَ دَعْوَتِي شَفَاعَةً لأُمَّتِي يَوْمَ الْقِيَامَةِ ‏"‏ ‏.‏
Reference : Sahih Muslim 199c
In-book reference : Book 1, Hadith 399
USC-MSA web (English) reference : Book 1, Hadith 391
  (deprecated numbering scheme)