NET

20 for the Lord determined to make them obstinate so they would attack Israel. He wanted Israel to annihilate them without mercy, as he had instructed Moses.

Darby

20 For it was of Jehovah that their heart was hardened, to meet Israel in battle, that they might be utterly destroyed, and that there might be no favour shewn to them, but that they might be destroyed, as Jehovah had commanded Moses.

KJV

20 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.

Strong's

20 For it was of the LORD^H3068 to harden^H2388 their hearts^H3820, that they should come against^H7125 Israel^H3478 in battle^H4421, that he might destroy them utterly^H2763, and that they might have no favour^H8467, but that he might destroy^H8045 them, as the LORD^H3068 commanded^H6680 Moses^H4872.