Revelation 16:1-7: Watch what you sow.
“Then I heard a loud voice from the temple saying to the seven angels, ‘Go, pour out the seven bowls of God’s wrath on the earth.’2 The first angel went and poured out his bowl on the land, and ugly, festering sores broke out on the people who had the mark of the beast and worshipped its image.3 The second angel poured out his bowl on the sea, and it turned into blood like that of a dead person, and every living thing in the sea died.4 The third angel poured out his bowl on the rivers and springs of water, and they became blood. 5 Then I heard the angel in charge of the waters say:
‘You are just in these judgments, O Holy One,
you who are and who were;
6 for they have shed the blood of your holy people and your prophets,
and you have given them blood to drink as they deserve.’
7 And I heard the altar respond:‘Yes, Lord God Almighty, true and just are your judgments.’ NIV
It seems to me to be a repeated Bible principle that we reap what we sow. It may take time for the harvest to grow, and some of the reaping may be in the next life, but as we sow, so shall we reap.
‘’Do not be deceived: God cannot be mocked. A man reaps what he sows’’ (Galatians 6:7).
When Jesus comes again, ‘’All the nations will be gathered before him…’’ (Matthew 25:32). But even before He returns, there will be a working out of judgment in this world.