Arcana Coelestia #2787
2787. Verse 4 On the third day Abraham lifted up his eyes and saw the place from afar off.
'On the third day' means that which has been completed, and the beginning of sanctification. 'And Abraham lifted up his eyes and saw' means thought and insight received from the Divine. 'The place from afar off' means into the state which He foresaw.
Numbers 19:12-13
12
the same shall purify himself with water on the third day, and on the seventh day he shall be clean: but if he doesn't purify himself the third day, then the seventh day he shall not be clean.
13
Whoever touches a dead person, the body of a man who has died, and doesn't purify himself, defiles the tabernacle of Yahweh; and that soul shall be cut off from Israel: because the water for impurity was not sprinkled on him, he shall be unclean; his uncleanness is yet on him.