97369577__Forcing_Tithing_On_Christians__Under_the_law_of_Moses
[Abraham’s Tithe] Abraham wanted to pay tributes to God and return the rest to the King of Sodom after rescuing his nephew Lot [Jacob’s Tithe] Hebrew language says Jacob had fear and doubts about God and to manipulate God he made a conditional vow to tithe! [Under the law of Moses] 
It was mandatory
Tithing Is Not For New Testament Christians! | Not Against Giving But Against Forcing Tithing On Christians
Under the law of Moses