80 The form is the Piel perfect with a vav (ו) consecutive (וּבֵרַכְתֶּם, uverakhtem); coming in the sequence of imperatives this perfect tense would be volitional—probably a request rather than a command. Pharaoh probably meant that they should bless him also when they were sacrificing to Yahweh in their religious festival—after all, he might reason, he did let them go (after divine judgment). To bless him would mean to invoke good gifts from God for him.

In other versions

Take your flocks and your herds, as you have said, and be gone, and bless me also!”

Take your flocks and herds, as you have said, and go. And also bless me.”

Take even your flocks and your herds as you asked and leave, and also bless me.”

Take your flocks and herds, as you said, and be gone. Go, but bless me as you leave.”

Take both your sheep and goats as well as your cattle, and go, and bless also me.”

Also take your flocks and your herds, as ye have said, and be gone; and bless me also.

Public Domain