Ge-sóþian

According to the Old English Dictionary:

ic -sóþige;

ge-sóþian

p. ode; pp. od To prove the truth of, bear witness; probare, testari :-- Gif man ðæt gesóþige if that be proved, L. E. G. 6; Th. i. 170, 13. Menigo of hláfe and líchoma his gesóþade plurima de pane et carne sua testatur, Jn. Skt. p. 5, 2. ge-soþian