The loins, as in Ezekiel 29:7, signify the marriage of truth and good. In general, loins signify love, and when referring to the Lord, divine love. They can also signify the interiors of conjugial love. In Isaiah 11:5, they signify people in the divine good of love, and reins signify people in love towards their neighbor.

(Odkazy: Apocalypse Revealed 830)

6688. 'And the people multiplied and became very numerous' means that within the natural, truths were constantly emerging and so increasing. This is clear from what has been stated above in 6648, where similar words occur. 'The people' is used in reference to truths, see 1259, 1260, 3295, 3581.