Musnad Ahmad 2:16

Mu'ammal narrated to us, Hammad narrated to us, he said: Ziyad ibn Mikhraq narrated to us, from Shahr, from 'Uqbah ibn 'Amir, he said: 'Umar narrated to me that he heard the Messenger of Allah, peace and blessings of Allah be upon him, saying: "Whoever dies believing in Allah and the Last Day, it will be said to him: 'Enter Paradise from whichever of the eight gates of Paradise you wish.'"