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.

Both here and in Matthew 12:7, Christ quoted from Hosea 6:6. The context in that passage shows that Christ was here comparing the Pharisees with the reprobate priesthood of Hosea's times. In that same paragraph, Hosea charged, "And as the troops of robbers wait for a man, so the company of priests murder in the way by consent; for they commit lewdness" (Hosea 6:6-9). This, of course, must have infuriated the Pharisees who, as subsequent events would prove, were every whit as wicked as the Lord indicated. His words continued to be ironical when he said, "I came not to call the righteous"; for of course he did call the truly righteous, and, for that matter, even the Pharisees; but they would not be called.