NET
30 “After forty years had passed, an angel appeared to him in the desert of Mount Sinai, in the flame of a burning bush.
Darby
30 And when forty years were fulfilled, an angel appeared to him in the wilderness of mount Sinai, in a flame of fire of a bush.
KJV
30 And when forty years were expired, there appeared to him in the wilderness of mount Sina an angel of the Lord in a flame of fire in a bush.