Chiasm of Flood Narrative Numbers

Seven days from now I will send rain on the earth for forty days and forty nights,...
Genesis 7:4 NIV

α: Seven days waiting to enter Ark (7:4)

β: Second mention of seven days waiting (7:10)

γ: 40 days (7:17)

δ: 150 days (7:24)

χ: God remembers Noah (8:1)

δ': 150 days (8:3)

γ': 40 days (8:6)

β': Seven days waiting for dove (8:10)

α': Second seven days waiting for dove (8:12)