Word by Word Analysis

وَلَمَّا رَءَا ٱلْمُؤْمِنُونَ ٱلْأَحْزَابَ قَالُوا۟ هَـٰذَا مَا وَعَدَنَا ٱللَّهُ وَرَسُولُهُۥ وَصَدَقَ ٱللَّهُ وَرَسُولُهُۥ ۚ وَمَا زَادَهُمْ إِلَّآ إِيمَـٰنًا وَتَسْلِيمًا 22

And when the believers saw the companies, they said, "This is what Allāh and His Messenger had promised us, and Allāh and His Messenger spoke the truth." And it increased them only in faith and acceptance.