Commentaries:
Robertson's Word Pictures (NT)
Groaneth and travaileth in pain (sunstenazei kai sunwdinei). Two more compounds with sun. Both rare and both here alone in N.T. Nature is pictured in the pangs of childbirth.
Other Robertson's Word Pictures (NT) entries containing Romans 8:22:
Matthew 27:45
Acts 3:21
Philippians 2:10
Colossians 1:20
Revelation 5:13
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