'On the Third Day' in the Bible

On the third day Eliab son of Helon, leader of the descendants of Zebulun:

He will purify himself on the third day, and on the seventh day he will be clean. If he does not purify himself on the third day, he will not be clean on the seventh day.

The clean [person] will spatter the unclean on the third day and on the seventh day; and on the seventh day he will purify him, and he will wash his garments; he will bathe in the waters, and in the evening he will be clean.

" 'On the third day: eleven bulls, two rams, fourteen male lambs without defect {in their first year};

And you, camp outside the camp seven days; all who killed a person and all who touched the slain purify yourselves on the third day and on the seventh day, you and your captives.