Musnad Abu Ya'la al-Mawsili 3:305

Al-Qawariri narrated to us, Harami bin 'Umarah narrated to us, al-Fadl bin 'Umayrah Abu Qutaybah al-Qaysi narrated to us, he said: Maymun al-Kurdi Abu Nasir narrated to me, from Abu 'Uthman, from 'Ali bin Abi Talib, who said: While the Messenger of Allah (peace be upon him) was holding my hand and we were walking in some of the paths of Medina, we came upon a garden. I said, "O Messenger of Allah, what a beautiful garden it is!" He said, "You shall have one better than it in Paradise." Then we passed by another, and I said, "O Messenger of Allah, what a beautiful garden it is!" He said, "You shall have one better than it in Paradise." This continued until we had passed by seven gardens, and each time I would say, "What a beautiful garden it is!" and he would say, "You shall have one better than it in Paradise." When the path became clear for him, he embraced me, then he wept bitterly. I said, "O Messenger of Allah, what makes you weep?" He said, "Grudges in the chests of people who will not reveal them to you until after I am gone." I said, "O Messenger of Allah, will my religion be safe?" He said, "Your religion will be safe."