Musnad Ahmad 30:1586

Yahya ibn Abi Bukayr narrated to us, Zuhayr ibn Muhammad narrated to us, from Suhayl ibn Abi Salih, from his father, from Abu Hurayrah, from the Messenger of Allah, may Allah bless him and grant him peace, that he said: "I asked my Lord, the Almighty and Exalted, and He promised me that He would cause seventy thousand of my nation to enter [Paradise] in the image of the moon on the night of the full moon." "So I asked for more, and He increased me, with every thousand, seventy thousand." "I said: 'O my Lord, if these are not the emigrants (Muhajirun) of my nation?' He said: 'Then I will complete them for you from the Bedouins.'"