Fore-saga (?)

According to the Old English Dictionary:

(1)

fore-saga (?)

a prologue, preface:--Forerím l [fore]tal l [fore]-saga [ = -sagu?) prologus, Mt. p. 1, 1. In foresaga in prochemio, Jn. p. 187, 12. Mið forasaga praefatione, Lk. p. 3, 11. (2) translation:--Of foresaga de translatione, Lk. p. 9, 6. fore-saga