Charles Ellicott Commentary Deuteronomy 29:17

"and ye have seen their abominations, and their idols, wood and stone, silver and gold, which were among them);" — Deuteronomy 29:17 (ASV)

Their abominations. —This word occurs here for the first time, but the verb appears in Deuteronomy 7:26 (utterly detest), and in Leviticus 11:11; Leviticus 11:13; Leviticus 11:43; Leviticus 20:25. In the later scriptures of the Old Testament this word “abomination” is frequently used to denote an idol.

Their idols. —Either “great blocks,” or as in the margin, a term of extreme contempt. (See Leviticus 26:30, where the word first occurs.) It is a favourite term with the prophet Ezekiel, who uses it four times as often as other writers in the Old Testament.