1. Leviticus 7:38 (ESV)
  2. Exposition

When did the nation of Israel begin to practise the regulations given in Leviticus 1-7?

Leviticus 7:38 (ESV)

38 which the LORD commanded Moses on Mount Sinai, on the day that he commanded the people of Israel to bring their offerings to the LORD, in the wilderness of Sinai.

Leviticus 7:38 shows that the Israelites began offering these sacrifices immediately, during their sojourn in the wilderness. They did not only begin offering these sacrifices after they settled in the land of Canaan.