'Lettest' in the Bible

And when thou lettest him go free from thee, thou shalt not let him go empty:

It shall not seem hard unto thee, when thou lettest him go free from thee; for to the double of the hire of a hireling hath he served thee six years: and Jehovah thy God will bless thee in all that thou doest.

That against God thou turnest thy spirit, And lettest words go out of thy mouth?