προσόμνυμι

A. swear besides, X. An. 2.2.8, OGI 5.62 (Scepsis, iv B.C.); ὅρκον D.l.c., SIGl.c.; τὸν Δία ib.993.20 (Calaurea, iii B.C.).

2. include with in an oath, ταῖς ἡμέραις τὰς νύκτας Plu. 2.223b.