Lewis & Short

ŏhē, interj., ho! holloa! soho! ho there! ohe, inquam, si quid audis, Plaut. As. 2, 3, 4: ohe, Jam satis est, id. Stich. 5, 4, 52; Hor. S. 1, 5, 12; id. ib. 2, 5, 96; so Mart. 4, 91, 1 and 9.