Narrated AbuHurayrah:
The Prophet (ﷺ) said: To harbour good thoughts is a part of well-conducted worship. (This is according to Nasr's version).
Abu Dawud said: Mahna' is reliable and he is from Basrah.
Abu Hurairah narrated that the Messenger of Allah (ﷺ) said:
“Indeed, having good thoughts concerning Allah is from the perfection of the worship of Allah.”