حَسْبُنَا اللَّهُ وَنِعْمَ الْوَكِيلُ

HasbunAllahu wa ni'amal-wakeel

Allah is sufficient for me, and how fine a trustee (He is). This dua was recited by Ibrahim (As) when he was thrown into the fire. And Muhammad (ﷺ) recited this prayer when the people said to him, "The people are united against you!"

Reference: Bukhari: 4563