Ecclesiastes 1:1 introduces the Preacher as Solomon, identifying the author whose words of delight and truth are recorded in 12:10.

Ecclesiastes 1:12 adds that the Preacher was king over Israel, giving authority and context to his pursuit of words of truth.

Proverbs 1:1-6 states the purpose of wise sayings for understanding—matching the Preacher's effort to write upright words of truth.

Proverbs 8:6-10 has Wisdom speaking excellent, right things—mirroring the Preacher's 'acceptable words' and 'words of truth'.

In Job 6:25, Job declares the force of right words — directly paralleling the Preacher's pursuit of acceptable words of truth.

In Proverbs 10:32, the righteous know what is acceptable — directly echoing the Preacher's search for acceptable words.

Luke 1:1-4 describes writing an orderly account for certainty—similar careful effort to produce truthful writing as in Ecclesiastes 12:10.