Abdullah bin Abbas reported,

"Allah is sufficient for us, and He is the best Disposer of affairs" [Aal Imran 3:173] was said by Ibrahim when he was cast into the fire, and it was said by Muhammad ﷺ when the people told him, "Indeed, the people have gathered against you, so fear them. But it only increased them in faith, and they said, 'Allah is sufficient for us, and He is the best Disposer of affairs.'" [Aal Imran 3:173].

عن ابن عباس

{حسبنا الله ونعم الوكيل} قالها إبراهيم عليه السلام حين ألقي في النار، وقالها محمد ﷺ حين قالوا: {إن الناس قد جمعوا لكم فأخشوهم فزادهم إيمنا وقالوا حسبنا الله ونعم الوكيل} [سورة آل عمران: ١٧٣].