When the true believers saw the parties (ready to attack), they said, “This is what God and His messenger have promised us, and God and His messenger are truthful.” This (dangerous situation) only strengthened their faith and augmented their submission.
وَلَمّا رَءَا المُؤمِنونَ الأَحزابَ قالوا هٰذا ما وَعَدَنَا اللَّهُ وَرَسولُهُ وَصَدَقَ اللَّهُ وَرَسولُهُ وَما زادَهُم إِلّا إيمٰنًا وَتَسليمًا
wa lammaa ra al mu’minoonal Ahzaaba qaaloo haazaa maa wa’adanal laahu wa Rasooluh; wa sadaqal laahu wa Rasooluh; wa maa zaadahum illaaa eemaananw wa tasleemaa