42 Heb “knowing.”
43 The disjunctive clause juxtaposes Jacob with Esau and draws attention to the striking contrasts. In contrast to Esau, a man of the field, Jacob was civilized, as the phrase “living in tents” signifies. Whereas Esau was a skillful hunter, Jacob was calm and even-tempered (תָּם, tam), which normally has the idea of “blameless.”

In other versions

When the boys grew up, Esau was a skillful hunter, a man of the field, while Jacob was a quiet man, dwelling in tents.

The boys grew up, and Esau became a skillful hunter, a man of the open country, while Jacob was content to stay at home among the tents.

When the boys grew up, Esau became an expert hunter, an outdoorsman, but Jacob was a quiet man who stayed at home.

As the boys grew up, Esau became a skillful hunter. He was an outdoorsman, but Jacob had a quiet temperament, preferring to stay at home.

And the boys grew up. And Esau was a skilled hunter, a man of the field, but Jacob was a peaceful man, living in tents.

And the boys grew: and Esau was a cunning hunter, a man of the field; and Jacob was a plain man, dwelling in tents.

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