«إِلَى أَنْ جَدَحَتْ لَهُ يَدُ الْإِمْلَاقِ كَأْسَ الْفِرَاقِ»
Their companionship lasted until poverty’s hand prepared the cup of separation.
Ilā an links to a nominalized clause, defining an endpoint for the preceding companionship. Jadaḥat is a feminine perfect verb whose grammatical subject is the iḍāfah yadu al-imlāq, “the hand of poverty.”
Two personifications operate at once: poverty receives a hand, and separation becomes a drink mixed in a cup. Grammatically the clause marks a temporal boundary, not an independent claim that poverty literally possesses a body.