Carl Friedrich Keil and Franz Delitzsch Old Testament Commentary
"In that day will the fair virgins and the young men faint for thirst. Amo 8:14. They who swear by the guilt of Samaria, and say, By the life of thy God, O Dan! and by the life of the way to Beersheba; and will fall, and not rise again." Those who now stand in all the fullest and freshest vigour of life, will succumb to this hunger and thirst. The virgins and young men are individualized, as comprising that portion of the nation which possessed the vigorous fulness of youth. עלף, to be enveloped in night, to sink into a swoon, hithp. to hide one's self, to faint away. הנּשׁבּעים refers to the young men and virgins; and inasmuch as they represent the most vigorous portion of the nation, to the nation as a whole. If the strongest succumb to the thirst, how much more the weak! 'Ashmath Shōmerōn, the guilt of Samaria, is the golden calf at Bethel, the principal idol of the kingdom of Israel, which is named after the capital Samaria (compare Deu 9:21, "the sin of Israel"), not the Asherah which was still standing in Samaria in the reign of Jehoahaz (Kg2 13:6); for apart from the question whether it was there in the time of Jeroboam, this is at variance with the second clause, in which the manner of their swearing is given, - namely, by the life of the god at Dan, that is to say, the golden calf that was there; so that the guilt of Samaria can only have been the golden calf at Bethel, the national sanctuary of the ten tribes (cf. Amo 4:4; Amo 5:5). The way to Beersheba is mentioned, instead of the worship, for the sake of which the pilgrimage to Beersheba was made. This worship, again, was not a purely heathen worship, but an idolatrous worship of Jehovah (see Amo 5:5). The fulfilment of these threats commenced with the destruction of the kingdom of Israel, and the carrying away of the ten tribes into exile in Assyria, and continues to this day in the case of that portion of the Israelitish nation which is still looking for the Messiah, the prophet promised by Moses, and looking in vain, because they will not hearken to the preaching of the gospel concerning the Messiah, who appeared as Jesus.
Jamieson-Fausset-Brown Bible Commentary
faint for thirst--namely, thirst for hearing the words of the Lord, being destitute of all other comfort. If even the young and strong faint, how much more the infirm (Isa 40:30-31)!
John Gill Bible Commentary
In that day shall the fair virgins and young men faint for thirst. After the word, for want of that grain and wine, which make young men and maids cheerful, Zac 9:17; but, being destitute of them, should be covered with sorrow, overwhelmed with grief, and ready to sink and die away. These, according to some, design the congregation of Israel; who are like to beautiful virgins, as the Targum paraphrases it; and the principal men of it, the masters of the assemblies: or, as others, such who were trusting to their own righteousness, and seeking after that which they could never attain justification by, and did not hunger and thirst after the righteousness of Christ, and so perished.
Amos 8:14