Komentarz do Wyjścia 17:8

ויבא עמלק THEN CAME AMALEK — Scripture places this section immediately after this preceding verse (they said, “Is the Lord among us or not?”) to imply, “I am ever among you and ready at hand for every thing you may need, and yet you say, “Is the Lord among us or not?” By your lives, I swear that the hound (Amalek) shall come and bite you, and you will cry for Me and then you will know where I am!” A parable: it may be compared to a man who carried his son upon his shoulder, and went out on a journey. The son saw an article and said, “Father, pick up that thing and give it to me”. He gave it to him, and so a second time and so also a third time. They met a certain man to whom the son said, “Have you seen my father anywhere?” Whereupon his father said to him, “Don’t you know where I am?” — He, therefore, cast him off from himself and a hound came and bit him (Midrash Tanchuma, Yitro 3).

ויבא עמלק, at the sound of the people’s being frustrated with thirst. This is what Moses meant when he recalled the incident 40 years later in Deuteronomy 25,18 describing the Israelites’ state of mind at the time as ואתה עיף ויגע, “you were tired and worn out.” We find the expression עיף linked to water also in Job 22,7 לא מים עייף תשקה, “You do not give the thirsty water to drink.” (Eliphaz accusing Job) We also find the word applied to earth itself in Isaiah 32,2 בארץ עיפה, “in a languishing land.”

ויבא עמלק וילחם עם ישראל, Amalek came and fought with Israel, etc. G'd punished the people for having neglected Torah which is compared to both fire and water (compare Jeremiah 23,29: "Behold My word is like fire"). The fiery sword and the thirst for water were the punishment which fitted the crime.