On the Day of Resurrection the Prophet (peace and blessings be upon him) will be the leader of the Prophets and their spokesman

It is narrated from Sayyiduna Ubayy bin Ka'b (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "When it is the Day of Resurrection, I will be the leader of all the prophets, their spokesman, and the one entrusted with their intercession (their intercessor), and I say this not by way of boasting (but as a statement of fact)."

It is narrated from Sayyiduna Ubayy bin Ka'b (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "When it is the Day of Resurrection, I will be the leader of all the prophets, their orator, and the one entrusted with their intercession, and I do not say this by way of boasting."
The chain of this hadith is sahih, but the two Shaykhs did not record it because Abdullah bin Muhammad bin Aqil bin Abi Talib is alone (in narrating it) and because of the poor memory attributed to him, even though in the view of our earlier imams he is trustworthy (thiqah) and reliable!