Malachi 3:2

3:2 Who can endure the day of his coming? Who can keep standing when he appears? For he will be like a refiner’s fire, like a launderer’s soap.

Malachi 4:1

4:1 (3:19) “For indeed the day is coming, burning like a furnace, and all the arrogant evildoers will be chaff. The coming day will burn them up,” says the Lord who rules over all. “It will not leave even a root or branch.

Matthew 3:9-12

3:9 and don’t think you can say to yourselves, ‘We have Abraham as our father.’ For I tell you that God can raise up children for Abraham from these stones! 3:10 Even now the ax is laid at the root of the trees, and every tree that does not produce good fruit will be cut down and thrown into the fire.

3:11 “I baptize you with water, for repentance, but the one coming after me is more powerful than I am – I am not worthy to carry his sandals. He will baptize you with the Holy Spirit and fire. 3:12 His winnowing fork is in his hand, and he will clean out his threshing floor and will gather his wheat into the storehouse, but the chaff he will burn up with inextinguishable fire.”

Hebrews 2:3

2:3 how will we escape if we neglect such a great salvation? It was first communicated through the Lord and was confirmed to us by those who heard him,

Hebrews 3:12

3:12 See to it, brothers and sisters, that none of you has an evil, unbelieving heart that forsakes the living God.

Hebrews 12:25

12:25 Take care not to refuse the one who is speaking! For if they did not escape when they refused the one who warned them on earth, how much less shall we, if we reject the one who warns from heaven?