A Psalm Every Day is a Kig-Yar vessel captained by Chur'R-Mut, a Kig-Yar Shipmistress. The vessel was sent to the 23 Librae system with Retribution's Thunder, to find the source of the modified Covenant Weapons, before it turned on Retribution's Thunder, by sending boarding parties which also consisted of Jiralhanae forces.[1]