18:25 The LORD spoke to Moses: 18:26 “You are to speak to the Levites, and you must tell them, ‘When you receive from the Israelites the tithe that I have given you from them as your inheritance, then you are to offer up from it as a raised offering to the LORD a tenth of the tithe. 18:27 And your raised offering will be credited to you as though it were grain from the threshing floor or as new wine from the winepress. 18:28 Thus you are to offer up a raised offering to the LORD of all your tithes which you receive from the Israelites; and you must give the LORD’s raised offering from it to Aaron the priest. 18:29 From all your gifts you must offer up every raised offering due the LORD, from all the best of it, and the holiest part of it.’

12:6 And there you must take your burnt offerings, your sacrifices, your tithes, the personal offerings you have prepared, your votive offerings, your freewill offerings, and the firstborn of your herds and flocks.

Tithes and offerings are not the same

- Proverbs 3:9-10.

Tithes open Heaven's windows to you

- Malachi 3:10

Offerings sow seed in your fields in expectation of harvest

- 2 Corinthians 9:5-11