References: 

• The fifth argument - 3:6-12
  • Immutability of God - vs 6
    • See Hebrews 6:16-20
    • Also Hebrews 13:8
  • Therefore… 
    • People referred to as children of, or descendents of Jacob
    • Another point back to Genesis; Jacob as deceiver, cheater, robber.
  • An unanswered question of the people? Vs 7
    • Consider God’s question to Adam “Where are you?” Gen 3:9
    • To Cain “Where is Abel?” Gen 4:9
  • Is it unanswered? God goes on to argue that the people have cheated (NLT) robbed (ESV, MSG) 
    • “Should people קָבַע (kaw-bah') cheat, rob
      • A word used only here in vss 8 & 9, and in Prov.
      • See Prov 22:22-23 (used 2x in v 23) - context
    •  Vs 10 - Bring the full tithe… An answer to the peoples’ question in vs 7? 
      • Abraham - Gen 14:18-20
      • Jacob - Gen 28:20-22
      • Torah - Lev 27:30
      • Nehemiah - Neh 13:10-12
    • Putting God to the test
      • Deut 6:16 - do NOT
      • Mat 4:7 - do NOT
      • Mal 3:10 - “Put me to the test!”
• Can we make sense of all this?