Messenger of Allah ﷺ said, "For every Prophet there is one invocation which is definitely fulfilled by Allah, and I wish, if Allah will, to keep my that (special) invocation as to be the intercession for my followers on the Day of Resurrection."  

قَالَ رَسُولُ اللَّهِ ﷺ لِكُلِّ نَبِيٍّ دَعْوَةٌ فَأُرِيدُ إِنْ شَاءَ اللَّهُ أَنْ أَخْتَبِيَ دَعْوَتِي شَفَاعَةً لأُمَّتِي يَوْمَ الْقِيَامَةِ  

that the Prophet ﷺ said, "For every prophet there is an invocation that surely will be responded by Allah," (or said), "For every prophet there was an invocation with which he appealed to Allah, and his invocation was accepted (in his lifetime), but I kept my (this special) invocation to intercede for my followers on the Day of Resurrection."  

عَنِ النَّبِيِّ ﷺ قَالَ كُلُّ نَبِيٍّ سَأَلَ سُؤْلاً أَوْ قَالَ لِكُلِّ نَبِيٍّ دَعْوَةٌ قَدْ دَعَا بِهَا فَاسْتُجِيبَ فَجَعَلْتُ دَعْوَتِي شَفَاعَةً لأُمَّتِي يَوْمَ الْقِيَامَةِ