A.T. Robertson Commentary Matthew 9:13

"But go ye and learn what [this] meaneth, I desire mercy, and not sacrifice, for I came not to call the righteous, but sinners." — Matthew 9:13 (ASV)

But go ye and learn (πορευθεντες δε μαθετε). With biting sarcasm Jesus bids these preachers to learn the meaning of Ho 6:6. It is repeated in Mt 12:7. Ingressive aorist imperative (μαθετε).