Deuteronomy 3:6

We destroyed all the towns and put to death all the men, women, and children. This was just as we did in the towns that belonged to King Sihon of Heshbon.

Deuteronomy 2:34

We captured and destroyed every town in Sihon's kingdom. We killed everyone.

Deuteronomy 2:24

Moses continued: Cross over the Arnon River. I will help you defeat Sihon the Amorite, king of Heshbon and his country. Possess his land and engage him in battle.

Psalm 135:10-12

He struck great nations and killed mighty kings,

Leviticus 27:28-29

However, everything dedicated to Jehovah for destruction, a person, an animal, or a field that belongs to you, must not be sold or bought back. Everything dedicated in that way is very holy. It belongs to Jehovah.

Numbers 21:2

Then the Israelites made a vow to Jehovah: If you will let us conquer these people, we will unconditionally dedicate them and their cities to you and will destroy them.

Deuteronomy 3:2

Jehovah said to me: 'Do not be afraid of him. I will hand him, all his army, and his land, over to you. Do to him what you did to King Sihon of the Amorites, who ruled in Heshbon.'

Deuteronomy 20:16-18

Do not spare anyone's life in the cities of these nations Jehovah your God is giving you as your property.

Joshua 11:14

Israel took all the spoil of these cities including the cattle. They killed every man with the edge of the sword, until they had destroyed them all. None were left alive.

Psalm 136:19-21

Sihon, king of the Amorites, for his loving kindness is everlasting,

Treasury of Scripture Knowledge

Summary

And we utterly destroyed them, as we did unto Sihon king of Heshbon, utterly destroying the men, women, and children, of every city.

Bible References

We utterly

Deuteronomy 2:34
We captured and destroyed every town in Sihon's kingdom. We killed everyone.
Deuteronomy 20:16
Do not spare anyone's life in the cities of these nations Jehovah your God is giving you as your property.
Leviticus 27:28
However, everything dedicated to Jehovah for destruction, a person, an animal, or a field that belongs to you, must not be sold or bought back. Everything dedicated in that way is very holy. It belongs to Jehovah.
Numbers 21:2
Then the Israelites made a vow to Jehovah: If you will let us conquer these people, we will unconditionally dedicate them and their cities to you and will destroy them.
Joshua 11:14
Israel took all the spoil of these cities including the cattle. They killed every man with the edge of the sword, until they had destroyed them all. None were left alive.

As we did

Deuteronomy 3:2
Jehovah said to me: 'Do not be afraid of him. I will hand him, all his army, and his land, over to you. Do to him what you did to King Sihon of the Amorites, who ruled in Heshbon.'
Deuteronomy 2:24
Moses continued: Cross over the Arnon River. I will help you defeat Sihon the Amorite, king of Heshbon and his country. Possess his land and engage him in battle.
Psalm 135:10
He struck great nations and killed mighty kings,
Psalm 136:19
Sihon, king of the Amorites, for his loving kindness is everlasting,