แหล่งกำเนิด 30:16
Many thanks to Philip Pope for the permission to use his 2003 translation of the English King James Version Bible into Thai. Here's a link to the mission's website: www.thaipope.org
Arcana Coelestia #3977
3977. For thou knowest my service wherewith I have served thee. That this signifies labor and study by His own power, may be seen from what has been said and adduced just above (n. 3975); thus without further explication. What these things involve further, is manifest from what has been said above (n. 3974), and also from what follows.