Ali (ع) said:
"One day, I and the Messenger of Allah (ص) were walking down some of the alleys of Medina while the Messenger of Allah (ص) had my hand in his hand. We passed near one garden. I said, “O Messenger of Allah (ص)! What a beautiful garden! He said, “The garden that is made for you in Heaven is much more beautiful. Then, while still walking, we reached another garden. I said, "O Messenger of Allah, this garden too is beautiful." He said, "Your garden in Heaven is more beautiful." We walked until we passed seven gardens, and in each occasion, I repeated saying “How beautiful it is!” and the Prophet (ص) repeatedly replied, “Your garden in Heaven is more beautiful.” When we reached the end of the road, the Prophet hugged me and then burst into tears. I said: O Prophet of Allah! What makes you cry? He said, "From the grudges that are concealed in the hearts of a group that are against you and they do not reveal their grudges but after I live no more." I asked, "Will I be safe and sound in my religion?" He said, "Yes, you would be safeguarded in your religion."
Abu Ya’la al-Mawsili, Musnad, V.1, page 427; Khatib Baghdadi, Tarikh-e-Baghdad, V.12, page 394; Ibn Asaker, Tarikh Madinah-Damishq, V.42, page 323; Ahmad ibn Hanbal, Fazail-e-Sahaba, V.2, page 651; Haythami, Maj’mah al-Zawaid, V. 9, page 118; Kharazmi, Al-Manaqib, page 65.