Dalil

Quran Ali 'Imran 3:122

إِذۡ هَمَّت طَّآئِفَتَانِ مِنكُمۡ أَن تَفۡشَلَا وَٱللَّهُ وَلِيُّهُمَاۗ وَعَلَى ٱللَّهِ فَلۡيَتَوَكَّلِ ٱلۡمُؤۡمِنُونَ

Translation

When two parties among you were about to lose courage, but Allāh was their ally; and upon Allāh the believers should rely.