1 Samuel 17:16

And the Philistine drew near morning and evening,.... Twice a day he came near the camp, within the hearing of it. The Jews w say, he took those seasons on purpose to disturb them in reading their "Shema", or "hear, O Israel", c. and saying their prayers morning and evening:

and presented himself forty days Successively, before the armies of Israel, daring them to send down a man to fight with him, and reproaching them for their cowardice in not doing it.

w T. Bab. Sotah, fol. 42. 2.