فَعَلَيْهِ دَمَانِ: دَمٌ لِحَجَّتِهِ وَدَمٌ لِعُمْرَتِهِ
Translation: Thus two offerings are due: one for his Hajj and one for his Umrah.
ʿAlayhi is a fronted prepositional predicate.
Damani is a delayed nominative dual subject, signaled by the alif.
Damun li-hajjatihi and damun li-ʿumratihi distinguish two purposes.
The dual grammatical form mirrors the two separate liabilities expressly stated in the ruling.