'Dealest' in the Bible

Then the officers of the children of Israel came and cried unto Pharaoh, saying, Wherefore dealest thou thus with thy servants?

Woe to thee that destroyest, and thou wast not destroyed; and dealest treacherously, and they dealt not treacherously with thee! When thou hast ceased to destroy, thou shalt be destroyed; and when thou hast made an end of dealing treacherously, they shall deal treacherously with thee.