Sunan an-Nasa'i 1354
سنن النسائي#1354Da'ifIt was narrated that Abu Hurairah said:"The Messenger of Allah (ﷺ) said: 'Whoever says the tasbih one hundred times following the morning prayer, and the tahlil one hundred times, he will be forgiven his sins even if they are like the foam of the sea
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Abu GhuddahSahih Isnaad
Al-AlbaniSahih Isnaad
Zubair Ali ZaiDaif
In-book reference: 13:176