Musannaf Ibn Abi Shayba 27:309

Muhammad ibn Fudayl narrated to us, from ‘Ata’, from al-Hasan, who said: The Messenger of Allah (peace and blessings of Allah be upon him) said: "Indeed, in Paradise there are birds like the Bactrian camels. A man will come to one and take from it, then it will go away as if nothing had been diminished from it." Abu Bakr said: "O Messenger of Allah, those birds are soft/delicate." He said: "And the one who eats them is softer/more delicate than them. And indeed, you are among those who will eat them."