Verse 18. - And smote the hindmost of thee; literally, and tailed thee; i.e. cut off thy tail, or rear. The verb (זִנֵּב) occurs only here and in Joshua 10:19. It is a denominative from זָנָב, a tail, and, like many denominatives, both in the Hebrew and in other languages, it has the sense of taking away or cutting off the thing expressed by the noun from which it is formed, like the English verb to skin, for example.

25:17-19 Let every persecutor and injurer of God's people take warning from the case of the Amalekites. The longer it is before judgement comes, the more dreadful will it be at last. Amalek may remind us of the foes of our souls. May we be enabled to slay all our lusts, all the corruptions both within and without, all the powers of darkness and of the world, which oppose our way to the blessed Saviour.How he met thee by the way,.... Not with necessary provisions, food and drink, which would have been but a piece of kindness and humanity to travellers; but met them sword in hand, in order to stop their journey, and make them captives, at least to harass and distress them:

and smote the hindmost of thee; came upon them in a sly cowardly manner, and attacked their rear:

even all that were feeble behind thee: women and children, and such men as were weak, sickly, labouring under some disorder, and so lagged behind, and could not keep up with the rest; on these Amalek first fell, and began his attack here:

when thou wast faint and weary; with travelling, and the more so for want of water, which was their case at Rephidim, when Amalek came out against them; which is another aggravation of their unkind usage of them they were not to forget:

and he feared not God; who was then in the pillar of cloud and fire with Israel, which phenomenon Amalek might see, and yet did not fear; and who had done such wonders for Israel in Egypt, and had brought them from thence, and had drowned Pharaoh and his host in the Red sea, of which doubtless Amalek had heard, and yet feared not the Lord, who had done such great things.