The writer's condemnation of Solomon in verses 1-2 rests on Deuteronomy 23:3-9 as well as Deuteronomy 7:3-4. The phraseology goes back to 23:3-9 and the motive to 7:3-4 (cf. Exod. 23:31-33; 34:15-16; Ezra 9:1; Neh. 13:26). Solomon's foreign wives were of two categories: Canaanites prohibited in Deuteronomy 7, and women from other nations prohibited in Deuteronomy 23.111Furthermore, God specifically forbade the multiplying of wives by Israel's kings (Deut. 17:17). Solomon violated both the letter and the spirit of the Law.112
Solomon's harem of 700 wives and 300 concubines (secondary wives, not mistresses, v. 3) was the largest of any Israelite king. The next largest was Rehoboam's 18 wives and 60 concubines (2 Chron. 11:21). David had 15 wives (2 Sam. 3:2-5; 5:13-16; 11:27; 1 Chron. 3:1-9) and several concubines (2 Sam. 15:16). Apparently only one of David's wives was a foreigner (2 Sam. 13:37; 1 Chron. 3:2).
"The large number resulted from political alliances, sealed by marriage, with neigbouring [sic] states: Moab, Ammon and Edom to the east; Sidon, through the treaty with Hiram (5:1), and Syria (Hittites' and Arameans, 10:22) to the north. . . . These are cited as examples . . ."113
Solomon did not abandon Yahweh, but he worshipped the gods of the nations along with Him (syncretism; vv. 4, 6). His sin was that his heart (affections) went after false gods (v. 4). He did not follow Yahweh fully (exclusively, v. 6; cf. Exod. 20:3; Deut. 30:15-20). Solomon was noteworthy for his love for God when he began reigning (3:3), but at the end of his reign love for women characterized him (v. 1).
Ashtoreth was the Canaanite fertility goddess whose worship involved licentious rites and the worship of the stars. Molech worship included human sacrifice, even the sacrifice of children (cf. Lev. 18:21; 20:1-5). Chemosh worship was equally cruel. Solomon at least tolerated idolatrous worship if he did not actively promote it. The mountain east of Jerusalem to which verse 7 refers was traditionally south of the Mount of Olives. However it could have been the Mount of Olives in view of what the text says. Evidently Solomon felt compelled to support the worship of his foreign wives whom he had married to secure political alliances. One sin led to others as always happens.
"In the ancient world polytheists tended to worship the gods of nations who had conquered their armies or at least the gods of countries more powerful than their own. Ironically, Solomon worships the gods of people he has conquered and already controls. What could he possibly gain from such activity? The whole episode makes no sense, just as idolatry itself makes no sense."114