What is the ruling on killing a louse while in a state of Ihram, and is a expiatory offering (dam) required of the killer, and how is this expiatory offering to be made?

Killing a louse does not necessitate a compensatory sacrifice (dam), but the pilgrim in a state of ihram who kills it should give some food in charity, even if it is just a handful or a morsel. This is the view of the Malikis regarding one to nine lice, and it is also a saying among the Hanbalis, the Hanafis (Ahl al-Ra'y), and the Shafi'is.