Jamieson, Fausset and Brown on 1 Samuel 14:4

4. between the passages--that is, the deep and great ravine of Suweinit.

Jonathan sought to go over unto the Philistines' garrison--a distance of about three miles running between two jagged points; Hebrew, "teeth of the cliff."

there was a sharp rock on the one side, and a sharp rock on the other side ... Bozez--("shining") from the aspect of the chalky rock.

Seneh--("the thorn") probably from a solitary acacia on its top. They are the only rocks of the kind in this vicinity; and the top of the crag towards Michmash was occupied as the post of the Philistines. The two camps were in sight of each other; and it was up the steep rocky sides of this isolated eminence that Jonathan and his armorbearer (1Sa 14:6) made their adventurous approach. This enterprise is one of the most gallant that history or romance records. The action, viewed in itself, was rash and contrary to all established rules of military discipline, which do not permit soldiers to fight or to undertake any enterprise that may involve important consequences without the order of the generals.