'Deal' in the Bible

He can deal gently with people who are ignorant and easily deceived, since he himself is subject to weakness.

since they deal only with food, drink, and various washings, which are required for the body until the time when things would be set right.

so the Messiah was sacrificed once to take away the sins of many people. And he will appear a second time, not to deal with sin, but to bring salvation to those who eagerly wait for him.