Silsilat al-Ahadith al-Sahihah

Sayyiduna Anas bin Malik (may Allah be pleased with him) narrates that the Messenger of Allah (peace and blessings be upon him) said: "On the Day of Resurrection, I will come to the gate of Paradise and request for it to be opened. The gatekeeper will ask: Who are you? I will reply: I am Muhammad. (Upon hearing this) he will say: I have been commanded regarding you that I should not open (the gate of) Paradise for anyone before you."