It was narrated from al-Khadir bin al-Qawwas from Abu Sukhailah
`Ali (رضي الله عنه) said: Shall I not tell you of the best verse in the Book of Allah, may He be exalted, that the Messenger of Allah (ﷺ) told to us? [It is:] `And whatever of misfortune befalls you, it is because of what your hands have earned. And He pardons much” [ash-Shoora 42:30]. [He said:] “I will explain it to you, O ‘Ali. ‘And whatever of misfortune befalls you`, be it sickness or punishment or trials in this world, `it is because of what your hands have earned`. And Allah is too generous to double the punishment in the Hereafter, Whatever Allah pardons in this world. He is too forbearing to retract His pardon.`