عَضَّتbit; held fast بنوthe sons of نَهدٍNahd بِفَعلِto the deed of أَبيهِمُtheir father
عَضَّت بنو نَهدٍ بِفَعلِ أَبيهِمُ
إِذاwhen ماan emphatic particle صَعُواthey fought (reading uncertain) الأَقوامَthe tribes عندat صَمَامِṢamām
إِذا ما صَعُوا الأَقوامَ عند صَمَامِ
Banu Nahd held fast to their father's deed,
The tribe of Nahd were bitten for their father's deed,
when they fought the tribes at Ṣamām.
Whenever they collided with the people at the watering place.