Ibn 'Abbas (May Allah be pleased with them) said:
When (Prophet) Ibrahim (Abraham) was thrown into the fire, he said: "Allah (Alone) is sufficient for us, and, He is the Best Disposer of affairs." So did Messenger of Allah Muhammad ﷺ when he was told: "A great army of the pagans had gathered against him, so fear them". But this (warning) only increased him and the Muslims in Faith and they said: "Allah (Alone) is sufficient for us, and He is the Best Disposer of affairs (for us)".

[Al-Bukhari].

الثالث: عن ابن عباس رضي الله عنهما أيضاً قال: "حسبنا الله ونعم الوكيل، قالها إبراهيم ﷺ حين ألقي في النار، وقالها محمد ﷺ حين قالوا: إن الناس قد جمعوا لكم فاخشوهم فزادهم إيمانا وقالوا: حسبنا الله ونعم الوكيل: ((رواه البخاري)).