Jami` at-Tirmidhi 3479
جامع الترمذي#3479Da'ifAbu Hurairah narrated that the Messenger of Allah (ﷺ) said:“Call upon Allah while being certain of being answered, and know that Allah does not respond to a supplication from the heart of one heedless and occupied by play.”
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Ahmad Muhammad ShakirHasan
Al-AlbaniHasan
Zubair Ali ZaiDaif
In-book reference: 48:110