Eusebius of Caesarea, on Ps 16:1

“The prayer of David. Hear, O Lord, my justice: attend to my supplication. Give ear unto my prayer, which proceedeth not from deceitful lips.”

“We speak fully and clearly when we use words taken from divine Scripture.… The righteous person alone cleanses his tongue, lips and the voice itself from using more common words, as one acquainted with that verse: "You will give an account of every careless word on the day of judgment." The ears of God do not hear words offered from lying lips, but they receive any word offered from a cleansed tongue accustomed to meditating on divine words.”

Imported from an open dataset — not yet checked against the printed edition.