After a while, Heb. at the end of days, i.e. of a year; for so the word days is oft used, as in Exo_13:10Lev_25:29Num_9:22Jud_17:101Sa_1:3 27:7. And this seems to be a convenient time for the drying up of the brook, which was gradually dried up; and so this agrees well with 1Ki_18:1,
in the third year; of which See Poole "1Ki_18:1".
The brook dried up; God so ordering it, partly, for the punishment of those Israelites who lived near it, and had hitherto been refreshed by it; partly, for the trial and exercise of Elijah’s faith, and to teach him to depend upon God alone, not on any creature, for his support; and partly, to show his own all-sufficiency in providing for his people.