Ecclesiastes 7:27 uses the same self-identification 'the Teacher', confirming the speaker's consistent voice throughout the book.

Ecclesiastes 12:8-10 repeats 'the Teacher' and describes his role in teaching and compiling proverbs, reinforcing the authorial identity.

Ecclesiastes 12:10 reveals the Preacher's character — he sought pleasing and truthful words, giving context to the authorship claim.

1 Kings 11:42 provides historical data that Solomon reigned 40 years in Jerusalem, matching the 'king in Jerusalem' identity of the Teacher.

1 Kings 11:43 records Solomon's death and burial, completing the historical record of the king introduced in Ecclesiastes 1:1.

2 Chronicles 9:30 also states Solomon reigned 40 years in Jerusalem, corroborating the historical identification of the Teacher.