تمسكhold fast بحبto the love of طاهرone pure القلبof heart واثبقpossibly 'trusting'; واثبق appears to be a typo for واثق
تمسك بحب طاهر القلب واثبق
بحبكin your love مشمولendowed بحسنwith fine الشمائلqualities of character
بحبك مشمول بحسن الشمائل
Hold fast to the love of one pure of heart, [apparently: trusting]
Hold fast to the pure love of your heart
in your love, endowed with fine qualities.
To the love adorned with good qualities
ولاand do not تكbe للغدارto the treacherous one خلاa close friend وصاحباand a companion
ولا تك للغدار خلا وصاحبا
فشراfor the worst لاخلاءof friends (irregularly divided in the text) الكثيرthe one with many الغوائلtreacheries
فشرا لاخلاء الكثير الغوائل
And do not be a close friend and companion to the treacherous,
Do not be a friend or companion to the betrayer
for the worst of friends is one whose treacheries are many.
For evil has many pitfalls
Claude 2 is inferred from the historical translator configuration. The original record does not identify its model.