491. The same things are signified by “sons” and “daughters” in this chapter (verses 4, 7, 10, 13, 16, 19, 26, 30), but such as is the church, such are the “sons and daughters” that is, such are the goods and truths; the truths and goods here spoken of are such as were distinctly perceived, because they are predicated of the Most Ancient Church, the principal and parent of all the other and succeeding churches.
Arcana Coelestia #533
533. As nothing more is related concerning Lamech than that he begat sons and daughters, which are the conceptions and births of such a church, we shall dwell no longer on the subject. What the births were, or the “sons and daughters” appears from the church; for such as is the church, such are the births from it. Both the churches called “Methuselah” and “Lamech” expired just before the flood.