1 Samuel 25:16 in the World English Bible
They were a wall to us both by night and by day, all the while we were with them keeping the sheep.
Context
15 But the men were very good unto us, and we were not hurt, neither missed we any thing, as long as we were conversant with them, when we were in the fields:
16 They were a wall unto us both by night and day, all the while we were with them keeping the sheep.
17 Now therefore know and consider what thou wilt do; for evil is determined against our master, and against all his household: for he is such a son of Belial, that a man cannot speak to him.