لَوif كانَwas يَمنَعُprotects حُسنُbeauty الوَجهِof the face صاحِبَهُits possessor
لَو كانَ يَمنَعُ حُسنُ الوَجهِ صاحِبَهُ
مِنfrom أَنthat يَكونَbe لَهُto him ذَنبٌan offense إِلىagainst أَحَدِanyone
مِن أَن يَكونَ لَهُ ذَنبٌ إِلى أَحَدِ
If beauty of face could protect its possessor
If a fair face could prevent its owner
from being guilty of an offense against anyone,
From wronging others or being unjust,
كانَتwould have been عُلَيَّةُʿUlayya أَبدىmost apparent (unclear here; context suggests 'farthest') الناسِthe people كُلِّهِمall of them
كانَت عُلَيَّةُ أَبدى الناسِ كُلِّهِم
مِنfrom أَنthat تُكافَأَshe be repaid بِسوءٍwith evil آخِرَuntil the end of الأَبَدِeternity
مِن أَن تُكافَأَ بِسوءٍ آخِرَ الأَبَدِ
ʿUlayya would have been farthest of all people [uncertain reading]
Then Ulaiyah would be for all eternity
from being repaid with evil until the end of time.
Spared from being requited with evil unsurpassed.