The Messenger of Allah ﷺ said, "Every prophet has a prayer that is granted, and each one has already made his. But I have kept mine in reserve as intercession for my community on the Day of Resurrection."
حدثنا يعمر أخبرنا عبد الله أخبرنا هشام قال سمعت الحسن يذكر
قال رسول الله ﷺ لكل نبي دعوة فدعا بها وإني استخبأت دعوتي شفاعة لأمتي يوم القيامة
Its isnad is sahih. Yumar is Ibn Bishr Khurasani, and he is trustworthy. Abdullah is Ibn Mubarak, and Hisham is Dastawai. The hadith has already appeared at 15054.