NET
31 When Israel saw the great power that the Lord had exercised over the Egyptians, they feared the Lord, and they believed in the Lord and in his servant Moses.
Darby
31 And Israel saw the great power [with] which Jehovah had wrought against the Egyptians; and the people feared Jehovah, and believed in Jehovah, and in Moses his bondman.
KJV
31 And Israel saw that great work which the LORD did upon the Egyptians: and the people feared the LORD, and believed the LORD, and his servant Moses.