'Mercy' in the Bible

but showing graciousness and lovingkindness to thousands [of generations] of those who love Me and keep My commandments.

and when the Lord your God gives them over to you and you defeat them, then you shall utterly destroy them. You shall not make a covenant (treaty) with them nor show mercy and compassion to them.

Therefore know [without any doubt] and understand that the Lord your God, He is God, the faithful God, who is keeping His covenant and His [steadfast] lovingkindness to a thousand generations with those who love Him and keep His commandments;

Nothing from that which is put under the ban (designated for destruction) shall cling to your hand, so that the Lord may turn away from His burning anger and show mercy to you, and have compassion on you and make you increase, just as He swore to your fathers,