Lewis & Short

Chĕrub, m. plur. Chĕrūbĭm (Cherubin), [??], plur. [??], the name of a rank of angels mentioned in the Old Testament, Vulg. Ezech. 9, 3; id. Gen. 3, 24; Prud. Cath. 4, 4; cf. Hier. in Ezech. 9 and 28; Isid. Orig. 7, 5, 22 sq.; 14, 3, 4; Ven. Fort. Carm. 7, 3, 131.