Sahih Adab al-Mufrad

Amr bin Shu’aib narrates from his father, and he from his grandfather, that he heard the Prophet (peace and blessings be upon him) say: “Shall I not tell you who among you is the dearest to me and who will be closest to me on the Day of Resurrection?” All the people remained silent. The Prophet (peace and blessings be upon him) repeated this two or three times. The people said: “Yes, O Messenger of Allah.” He said: “The one among you who has the best character.”