It is narrated from Sayyiduna Ibn Abbas (may Allah be pleased with them both) that the Messenger of Allah (peace and blessings be upon him) said: "Pulpits of gold will be set up for the Prophets, and they will sit on them, and my pulpit will remain, on which I will not sit," or he said: "I will not sit on it; rather, I will stand before my Lord, standing upright on behalf of my Ummah, for fear that I might be sent to Paradise while my Ummah is left behind after me. So I will say: O my Lord, my Ummah, my Ummah! Allah Almighty will say: O Muhammad, what do you want Me to do with your Ummah? I will say: O my Lord, make their reckoning just. So they will be called and taken to account; some of them will enter Paradise by the mercy of Allah, and some of them will enter Paradise through my intercession. I will keep interceding until I am given written releases for men who had already been sent to Hell, so much so that Malik, the keeper of Hell, will say: O Muhammad, you have not left any punishment from your Lord's anger for your Ummah."
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 10725