﴿ يَغْفِرْ لَكُمْ ذُنُوبَكُمْ وَيُدْخِلْكُمْ جَنَّٰتٍۢ تَجْرِى مِن تَحْتِهَا ٱلْأَنْهَٰرُ وَمَسَٰكِنَ طَيِّبَةًۭ فِى جَنَّٰتِ عَدْنٍۢ ۚ ذَٰلِكَ ٱلْفَوْزُ ٱلْعَظِيمُ ﴾

“[If you do so,] He will forgive you your sins, and [in the life to come] will admit you into gardens through which running waters flow, and into goodly mansions in [those] gardens of perpetual bliss: that [will be] the triumph supreme!”

He will then forgive you yaghfir is the response to an implied conditional that is to say ‘if you do this He will then forgive you’ your sins and admit you into gardens underneath which rivers flow and pleasant dwellings in the Gardens of Eden as a residence. That is the supreme triumph.