Muwatta Imam Malik Book of The Qur'an, Hadith 26
Yahya related to me from Malik from Abu'z-Zinad from al-Araj from Abu Hurayra that the Messenger of Allah ﷺ said, "Every prophet is given a supplication (dua), and I wish to preserve my dua as intercession for my community in the next world.
حَدَّثَنِي يَحْيَى، عَنْ مَالِكٍ، عَنْ أَبِي الزِّنَادِ، عَنِ الأَعْرَجِ، عَنْ أَبِي هُرَيْرَةَ، أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ " لِكُلِّ نَبِيٍّ دَعْوَةٌ يَدْعُو بِهَا فَأُرِيدُ أَنْ أَخْتَبِئَ دَعْوَتِي شَفَاعَةً لأُمَّتِي فِي الآخِرَةِ " .