Leviticus 25:8

Regulations for the Jubilee Year of Release

25:8 “‘You must count off seven weeks of years, seven times seven years, and the days of the seven weeks of years will amount to forty-nine years.

Leviticus 23:38

23:38 besides the Sabbaths of the Lord and all your gifts, votive offerings, and freewill offerings which you must give to the Lord.