Thy teeth are like a flock of sheep that are even shorn, which came up from the washing; whereof every one bear twins, and none is barren among them.

Wesley's Notes

4:2 A flock - Numerous, and placed in due order. Even - Smooth and even, as also clean and white. Twins - Which seems to denote the two rows of teeth. Barren - Not one tooth is lacking.

Jamieson-Fausset-Brown Bible Commentary

2. even shorn-the Hebrew is translated (1Ki 6:25), "of one size"; so the point of comparison to teeth is their symmetry of form; as in "came up from the washing," the spotless whiteness; and in "twins," the exact correspondence of the upper and lower teeth: and in "none barren," none wanting, none without its fellow. Faith is the tooth with which we eat the living bread (Joh 6:35, 54). Contrast the teeth of sinners (Ps 57:4; Pr 30:14); also their end (Ps 3:7; Mt 25:30). Faith leads the flock to the washing (Zec 13:1; 1Co 6:11; Tit 3:5).

none . barren-(2Pe 1:8). He who is begotten of God begets instrumentally other sons of God.

Matthew Henry's Concise Commentary

4:1-7 If each of these comparisons has a meaning applicable to the graces of the church, or of the faithful Christian, they are not clearly known; and great mistakes are made by fanciful guesses. The mountain of myrrh appears to mean the mountain Moriah, on which the temple was built, where the incense was burned, and the people worshipped the Lord. This was his residence till the shadows of the law given to Moses were dispersed by the breaking of the gospel day, and the rising of the Sun of righteousness. And though, in respect of his human nature, Christ is absent from his church on earth, and will continue to be so till the heavenly day break, yet he is spiritually present in his ordinances, and with his people. How fair and comely are believers, when justified in Christ's righteousness, and adorned with spiritual graces! when their thoughts, words, and deeds, though imperfect, are pure, manifesting a heart nourished by the gospel!