85 The time when the kingdom was removed from the tribe of Judah was the time appointed for the coming of Christ our Lord, the true Saviour, who should come not for harm, but for great good. Thus was it prophesied, "A prince shall not fail from Judah, nor a leader from his loins, till He come for whom it is reserved: He is the desire of nations." Not only the kingdom, but all government, of the Jews had ceased, and also, as prophesied by Daniel, the sacred anointing from which the name Christ or Anointed is derived.
Then came He for whom it was reserved, the desire of nations; and the holy of holies was anointed with the oil of gladness above His fellows. Christ was born in the time of the elder Herod, and suffered in the time of Herod the tetrarch. He who thus came to the lost sheep of the house of Israel was typified by Judah when he went to shear his sheep in Thamna, which means, failing. For then the prince had failed from Judah, with all the government and anointing of the Jews, that He might come for whom it was reserved.
Judah, we are told, came with his Adullamite shepherd, whose name was Iras; and Adullamite means, a testimony in water. So it was with this testimony that the Lord came, having indeed greater testimony than that of John; but for the sake of his feeble sheep he made use of the testimony in water. The name Iras, too, means, vision of my brother. So John saw his brother, a brother in the family of Abraham, and from the relationship of Mary and Elisabeth; and the same person he recognised as his Lord and his God, for, as he himself says, he received of His fullness. On account of this vision, among those born of woman, there has arisen no greater than he; because, of all who foretold Christ, he alone saw what many righteous men and prophets desired to see and saw not.
He saluted Christ from the womb; he knew Him more certainly from seeing the dove; and therefore, as the Adullamite, he gave testimony by water. The Lord came to shear His sheep, in releasing them from painful burdens, as it is said in praise of the Church in the Song of Songs, that her teeth are like a flock of sheep after shearing.
Source: Reply to Faustus the Manichaean (New Advent)