Matthew Poole and continuators on Psalms 45:13

13. The kings daughter is all glorious within ; her clothing is of wrought gold .

(i. e.) The Spouse, so called; Either, because she was the Daughter of one King, and the Wife of another: Or, because the Spouse or Wife, is sometimes called the Husbands Daughter; Partly, because she is supposed to be younger than he, and Partly, because of that respect and Subjection, which she oweth to him, and that Fatherly Care and Affection, which he oweth to her. See 2. Sam. 12. 3. Ier. 3. 4. So the Bridegroom calls his Spouse his Sister, Cant. 4. 19. Thus Livia, the Wife of Augustus is called his Sister in ancient Coins.

Either, 1. Even in her retiring Chambers, in the Kings Palace, and not onely when she sheweth her self abroad. Or rather, 2. In her mind and Soul, or in spiritual Endowments, the excellent Vertues and Graces wherewith she is accomplished. For, 1. This is opposed to her outward Clothing, 2. This being so great and so necessary a Qualification of a worthy Spouse, it is not likely it should be omitted in her Description and Commendation, especially when the Bridegroom is Commended for his inward Accomplishments, as well as for his outward Glory, v. 4. 7. 3 The Church is this Bride, as hath been said and proved before, whose true and chief Beauty is inward and spiritual, and not Consisting in outward Pomp and Glory.

Her inward Perfections do not rest within her, but break forth into Vertuous and honourable Actions, wherewith she is adorned in the view of the World. This suits well with the style of the holy Scriptures, wherein the Saints are oft said to be Cloathed, with Vertues and Vertuous Actions. See Psal. 132. 9. 1 Pet. 5. 5.