i.e. Was a husbandman, as he had been before. The verb to begin doth oft abound, and is applied to him that continueth or repeateth an action begun before. Thus Christ is said to begin to cast out, Mark 11:15, and to begin to speak, Luke 12:1; for which in the parallel places he is said only to cast out, Matthew 21:12, and to speak, Matthew 16:6.
Related Commentaries of Genesis 9:20
Genesis 9:20
20 And Noah began to be an husbandman, and he planted a vineyard: