Shmuel Alef 17:37-39 Orthodox Jewish Bible (OJB)
37 Dovid said moreover, Hashem that saved me out of the paw of the ari, and out of the paw of the dov, He will save me out of the yad of this Pelishti. And Sha’ul said unto Dovid, Go, and Hashem be with thee.
38 And Sha’ul dressed Dovid with his armor-clothes, put a kova of nechoshet upon his rosh; also he dressed him with a coat of mail armor.
39 And Dovid girded his cherev over his armor-clothes, and he tried to walk; for lo nissah (he had not tested, proved) it. And Dovid said unto Sha’ul, I cannot go with these; for lo nissti (I have not proved them). And Dovid took them off him.