A Commentary, Critical, Practical, and Explanatory on the Old and New Testaments, by Robert Jamieson, A.R. Fausset and David Brown  at sacred-texts.com
3 Kings (1 Kings) 17:1
kg1 17:1ELIJAH, PROPHESYING AGAINST AHAB, IS SENT TO CHERITH. (Kg1 17:1-7)
Elijah the Tishbite--This prophet is introduced as abruptly as Melchisedek--his birth, parents, and call to the prophetic office being alike unrecorded. He is supposed to be called the Tishbite from Tisbeh, a place east of Jordan.
who was of the inhabitants of Gilead--or residents of Gilead, implying that he was not an Israelite, but an Ishmaelite, as MICHAELIS conjectures, for there were many of that race on the confines of Gilead. The employment of a Gentile as an extraordinary minister might be to rebuke and shame the apostate people of Israel.
said unto Ahab--The prophet appears to have been warning this apostate king how fatal both to himself and people would be the reckless course he was pursuing. The failure of Elijah's efforts to make an impression on the obstinate heart of Ahab is shown by the penal prediction uttered at parting.
before whom I stand--that is, whom I serve (Deu 18:5).
there shall not be dew nor rain these years--not absolutely; but the dew and the rain would not fall in the usual and necessary quantities. Such a suspension of moisture was sufficient to answer the corrective purposes of God, while an absolute drought would have converted the whole country into an uninhabitable waste.
but according to my word--not uttered in spite, vengeance, or caprice, but as the minister of God. The impending calamity was in answer to his earnest prayer, and a chastisement intended for the spiritual revival of Israel. Drought was the threatened punishment of national idolatry (Deu 11:16-17; Deu 28:23).
3 Kings (1 Kings) 17:2
kg1 17:2the word of the Lord came unto him, saying, Get thee hence, and turn thee eastward, &c.--At first the king may have spurned the prediction as the utterance of a vain enthusiast; but when he found the drought did last and increase in severity, he sought Elijah, who, as it was necessary that he should be far removed from either the violence or the importunities of the king, was divinely directed to repair to a place of retreat, perhaps a cave on "the brook Cherith, that is, before [east of] Jordan." Tradition points it out in a small winter torrent, a little below the ford at Beth-shan.
3 Kings (1 Kings) 17:6
kg1 17:6the ravens brought him bread--The idea of such unclean and voracious birds being employed to feed the prophet has appeared to many so strange that they have labored to make out the Orebim, which in our version has been rendered "ravens," to be as the word is used (in Eze 27:27) "merchants"; or Arabians (Ch2 21:16; Neh 4:7); or, the citizens of Arabah, near Beth-shan (Jos 15:6; Jos 18:18). But the common rendering is, in our opinion, preferable to these conjectures. And, if Elijah was miraculously fed by ravens, it is idle to inquire where they found the bread and the flesh, for God would direct them. After the lapse of a year, the brook dried up, and this was a new trial to Elijah's faith.
3 Kings (1 Kings) 17:8
kg1 17:8HE IS SENT TO A WIDOW OF ZAREPHATH. (Kg1 17:8-16)
the word of the Lord came to him--Zarephath, Sarepta, now Surafend, whither he was directed to go, was far away on the western coast of Palestine, about nine miles south of Sidon, and within the dominions of Jezebel's impious father, where the famine also prevailed. Meeting, at his entrance into the town, the very woman who was appointed by divine providence to support him, his faith was severely tested by learning from her that her supplies were exhausted and that she was preparing her last meal for herself and son. The Spirit of God having prompted him to ask, and her to grant, some necessary succor, she received a prophet's reward (Mat 10:41-42), and for the one meal afforded to him, God, by a miraculous increase of the little stock, afforded many to her.
3 Kings (1 Kings) 17:17
kg1 17:17HE RAISES HER SON TO LIFE. (Kg1 17:17-24)
the son of the woman, the mistress of the house, fell sick--A severe domestic calamity seems to have led her to think that, as God had shut up heaven upon a sinful land in consequence of the prophet, she was suffering on a similar account. Without answering her bitter upbraiding, the prophet takes the child, lays it on his bed, and after a very earnest prayer, had the happiness of seeing its restoration, and along with it, gladness to the widow's heart and home. The prophet was sent to this widow, not merely for his own security, but on account of her faith, to strengthen and promote which he was directed to go to her rather than to many widows in Israel, who would have eagerly received him on the same privileged terms of exception from the grinding famine. The relief of her bodily necessities became the preparatory means of supplying her spiritual wants, and bringing her and her son, through the teachings of the prophet, to a clear knowledge of God, and a firm faith in His word (Luk 4:25).