Matthew 3:10

And already the axe is lying at the root of the trees; every tree, therefore, not bearing good fruit, is cut down, and cast into the fire.

Acts 3:19

Repent ye, therefore, and turn, that your sins may be blotted out, that so there may come seasons of refreshing from the presence of the Lord;

Treasury of Scripture Knowledge

Summary

If he turn not, he will whet his sword; he hath bent his bow, and made it ready.

Bible References

If

Matthew 3:10
And already the axe is lying at the root of the trees; every tree, therefore, not bearing good fruit, is cut down, and cast into the fire.
Acts 3:19
Repent ye, therefore, and turn, that your sins may be blotted out, that so there may come seasons of refreshing from the presence of the Lord;