Apris

Apri () in Sanskrit means "conciliation, propitiation" and refers to special invocations spoken previous to the offering of oblations in an animal sacrifice. Some scholars have proposed however, that these hymns were originally meant for a family ritual centered around Agni, which was then later connected to the animal sacrifice.

Aprisuktas
Of the ten Aprisuktas mentioned in Gargya Narayana's commentary, I.13 and I.142 both invoke  the  and  manifestations of Agni, I.188, III.4, IX.5 and X.110 invoke only the  manifestation and II.3, V.5, VII.2 and X.70 invoke only the  manifestation.