American Standard Version (ASV):
It is a night to be much observed unto Jehovah for bringing them out from the land of Egypt: this is that night of Jehovah, to be much observed of all the children of Israel throughout their generations.
King James Version (KJV):
It [is] a night to be much observed unto the LORD for bringing them out from the land of Egypt: this [is] that night of the LORD to be observed of all the children of Israel in their generations.