Sahih Muslim
Sahih Muslim 200 a
The Prophet (saws) will defer his supplication in order to intercede for his ummah
Arabic hadith text
حَدَّثَنِي أَبُو غَسَّانَ الْمِسْمَعِيُّ، وَمُحَمَّدُ بْنُ الْمُثَنَّى، وَابْنُ، بَشَّارٍ حَدَّثَانَا - وَاللَّفْظُ، لأَبِي غَسَّانَ - قَالُوا حَدَّثَنَا مُعَاذٌ، - يَعْنُونَ ابْنَ هِشَامٍ - قَالَ حَدَّثَنِي أَبِي، عَنْ قَتَادَةَ، حَدَّثَنَا أَنَسُ بْنُ مَالِكٍ، أَنَّ نَبِيَّ اللَّهِ صلى الله عليه وسلم قَالَ "لِكُلِّ نَبِيٍّ دَعْوَةٌ دَعَاهَا لأُمَّتِهِ وَإِنِّي اخْتَبَأْتُ دَعْوَتِي شَفَاعَةً لأُمَّتِي يَوْمَ الْقِيَامَةِ " .
Translation
Anas b. Malik reported
Verily the Messenger of Allah (ﷺ) said: There is for every apostle a prayer with which he prays (to Allah) for his Ummah. I have reserved my prayer for the intercession of my Ummah on the Day of Resurrection.