It is reported that Al-Hasan Al-Basri – Allâh have mercy on him – said when asked what is îmân (faith)?’:
It is perseverance (al-sabr) from the things that are forbidden by Allah the Mighty and Majestic and acceptance.
He was asked, “What is perseverance and acceptance?” He replied,
“al-sabr is to persevere in holding back from what Allah has forbidden, and [acceptance is] acceptance of what Allah the Mighty and Majestic has commanded.”
~ Hasan Al-Basri