لئنif indeed جادexcelled شعرُpoetry of ابنson of الحُسينal-Husayn فإنماthen it is only
لئن جاد شعرُ ابن الحُسين فإنما
تُجيدmake excellent العطاياgifts واللُّهيand largesse تفتحopens اللَّهَاthe uvulas (figuratively, mouths)
تُجيد العطايا واللُّهي تفتح اللَّهَا
If indeed Ibn al-Husayn's poetry excels, it is only
If Ibn al-Husayn's poetry overflows abundantly,
gifts that make it so, and largesse opens mouths.
Then it is because your gifts and charms unlock inspiration.
تَنَّبأclaimed prophethood عُجباًout of pride بالقريضin verse ولوand if دَرَىhe knew
تَنَّبأ عُجباً بالقريض ولو دَرَى
بأنّكthat you تَرويهrecite it إذاthen لتألَّهاhe would have claimed divinity
بأنّك تَرويه إذا لتألَّها
He claimed prophethood out of pride in his verse; and had he known
He would be amazed at his own poems, if only he knew
that you recite it, he would then have claimed divinity.
That it is you who inspires them, else they'd not exist.
Claude 2 is inferred from the historical translator configuration. The original record does not identify its model.