Deuteronomy 3:6

And [so] we destroyed them just as we had done to Sihon the king of Heshbon; [we destroyed] utterly each town of males, the women, and the little children.

Deuteronomy 2:34

So we captured all of his cities at that time, and we destroyed each town [of] males and the women and the children; we did not leave behind a survivor.

Deuteronomy 2:24

Arise, set out and cross [over] the wadi of Arnon. Look! I have given Sihon the Amorite, the king of Heshbon, and his land into your hand; begin to take possession of [it], and engage with him in battle.

Psalm 135:10-12

Who struck many nations and killed mighty kings--

Leviticus 27:28-29

However, anything devoted that a man has devoted to Yahweh {from all that he has}, from human or animal, or from the field of his property, may not be sold, and it may not be redeemed; anything devoted [is] {a most holy thing} for Yahweh.

Numbers 21:2

Israel made a vow to Yahweh, and they said, "If you will surely give this people into our hand, then we {will destroy} their cities."

Deuteronomy 3:2

And Yahweh said to me, 'You should not fear him, for I have given him and all [of] his army and his land into your hand. And [so] you will do to him as you did to Sihon the king of the Amorites, who [was] reigning in Heshbon.'

Deuteronomy 20:16-18

But from the cities of these peoples that Yahweh your God [is] giving to you as an inheritance, you shall not let anything live that breathes.

Joshua 11:14

And all the spoil and livestock of these cities the {Israelites} took as booty; they struck the people with {the edge of the sword}, until they had destroyed them--they left behind no one who breathed.

Psalm 136:19-21

Sihon the king of the Amorites, for his loyal love [endures] forever.

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
So we captured all of his cities at that time, and we destroyed each town [of] males and the women and the children; we did not leave behind a survivor.
Deuteronomy 20:16
But from the cities of these peoples that Yahweh your God [is] giving to you as an inheritance, you shall not let anything live that breathes.
Leviticus 27:28
However, anything devoted that a man has devoted to Yahweh {from all that he has}, from human or animal, or from the field of his property, may not be sold, and it may not be redeemed; anything devoted [is] {a most holy thing} for Yahweh.
Numbers 21:2
Israel made a vow to Yahweh, and they said, "If you will surely give this people into our hand, then we {will destroy} their cities."
Joshua 11:14
And all the spoil and livestock of these cities the {Israelites} took as booty; they struck the people with {the edge of the sword}, until they had destroyed them--they left behind no one who breathed.

As we did

Deuteronomy 3:2
And Yahweh said to me, 'You should not fear him, for I have given him and all [of] his army and his land into your hand. And [so] you will do to him as you did to Sihon the king of the Amorites, who [was] reigning in Heshbon.'
Deuteronomy 2:24
Arise, set out and cross [over] the wadi of Arnon. Look! I have given Sihon the Amorite, the king of Heshbon, and his land into your hand; begin to take possession of [it], and engage with him in battle.
Psalm 135:10
Who struck many nations and killed mighty kings--
Psalm 136:19
Sihon the king of the Amorites, for his loyal love [endures] forever.