Jeremiah 48:29

The sins of Moab were well-known: haughtiness, pride, arrogance, and self-exaltation.

"The sin of pride is one of the principal reasons for Moab’s downfall. Had she boasted in the righteous deeds of the Lord (cf. Psalms 20:7; Psalms 34:2; Jeremiah 9:24) she would have prospered. The Christian must avoid all false pride (cf. Mark 7:22; Romans 1:30; James 3:5, etc.), and must boast instead in God’s redemptive work in Christ (1 Corinthians 1:29 f.; Galatians 6:14, etc.), since every human boast has been destroyed in Him (1 Corinthians 1:25-30)." [Note: Harrison, Jeremiah and . . ., p. 176.]