Musnad Ahmad 268:0

Narrated to us by Hisham ibn Muhammad, from his father, from Khuraym ibn Fatik, who said: The Messenger of Allah (ﷺ) went out to a place called al-Bayda, then he returned and said: "Whoever performs a good deed, it is written for him ten times like it." Then he said: "O people of the tribe of Asad, do you see these two mountains? One of them is called al-Mukhli and the other is called al-Mukhliyah. By the One in Whose hand is the soul of Muhammad, the earth between them is not filled with gold or silver that is more beloved to me than that I should have a companion who believes in Allah and His Messenger, and then I would take him by the hand and enter Paradise with him." He said: Then he mentioned the rest of the hadith.