Matthew 3:10

the ax is already laid to the root of the trees: every tree then which does not produce good fruit, will be hewn down, and cast into the fire.

Acts 3:19

repent therefore, and be converted, that your sins may be blotted out, when the times of refreshment shall come from the presence of the Lord, who shall send Jesus Christ,

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
the ax is already laid to the root of the trees: every tree then which does not produce good fruit, will be hewn down, and cast into the fire.
Acts 3:19
repent therefore, and be converted, that your sins may be blotted out, when the times of refreshment shall come from the presence of the Lord, who shall send Jesus Christ,