https://pushpay.com/blog/20-bible-verses-about-tithing/WHAT IS TITHING?
Despite the fact that many people use the word “tithe” synonymously with any church-related giving, the word tithe literally means “tenth.”
The tithe was an obligatory offering from the law of Moses requiring 10 percent of an Israelite’s firstfruits. Because God provided the harvest, this first part was returned to Him. It was a reminder to Israel that all things we have are His. It was a show of thankfulness for His provision. It also provided for the Levitical priesthood, festivals, and the needy.