GOD'S WORD® Translation
The LORD made their enemies stubborn enough to continue fighting against Israel so that he could claim them all for destruction without mercy, as he had commanded Moses.

American Standard Version
For it was of Jehovah to harden their hearts, to come against Israel in battle, that he might utterly destroy them, that they might have no favor, but that he might destroy them, as Jehovah commanded Moses.

Berean Study Bible
For it was of the LORD to harden their hearts to engage Israel in battle, so that they would be set apart for destruction and would receive no mercy, being annihilated as the LORD had commanded Moses.

Douay-Rheims Bible
For it was the sentence of the Lord, that their hearts should be hardened, and they should fight against Israel, and fall, and should not deserve any clemency, and should be destroyed as the Lord had commanded Moses.

English Revised Version
For it was of the LORD to harden their hearts, to come against Israel in battle, that he might utterly destroy them, that they might have no favour, but that he might destroy them, as the LORD commanded Moses.

King James Bible
For it was of the LORD to harden their hearts, that they should come against Israel in battle, that he might destroy them utterly, and that they might have no favour, but that he might destroy them, as the LORD commanded Moses.

World English Bible
For it was of Yahweh to harden their hearts, to come against Israel in battle, that he might utterly destroy them, that they might have no favor, but that he might destroy them, as Yahweh commanded Moses.

Young's Literal Translation
for from Jehovah it hath been to strengthen their heart, to meet in battle with Israel, in order to devote them, so that they have no grace, but in order to destroy them, as Jehovah commanded Moses.

Joshua 11:20 Additional Translations ...