'Mercilessly' in the Bible

Oded, a prophet of the Lord, was there. He went to meet the army as they arrived in Samaria and said to them: "Look, because the Lord God of your ancestors was angry with Judah he handed them over to you. You have killed them so mercilessly that God has taken notice.

(Bet) The Lord destroyed mercilessly all the homes of Jacob's descendants. In his anger he tore down the fortified cities of Daughter Judah. He knocked to the ground and humiliated the kingdom and its rulers.

Will they continue to empty their netAnd [mercilessly] go on destroying nations without sparing?