First tithe — Grokipedia

Biblical Foundations
References in the Hebrew Bible
Scope and Purpose in Biblical Texts
Historical Development
Second Temple Period Practices
Post-Temple and Medieval Adaptations
Halakhic Regulations
Core Rules from Rabbinic Sources
Distinctions from Other Tithes
Modern Observance
Orthodox Jewish Practice
Variations in Reform and Conservative Judaism
Scholarly Perspectives
Source Criticism and Origins