Moses
Genesis 30:37ESV·traditional attribution

Then Jacob took fresh sticks of poplar and almond and plane trees, and peeled white streaks in them, exposing the white of the sticks.

John Calvin Reformed @genevareformer

37. And Jacob took him rods of green poplar. The narration of Moses, at first sight, may seem absurd: for he either intends to censure holy Jacob as guilty of fraud, or to praise his industry. But from the context it will appear that this adroitness was not culpable. Let us then see how it is to be excused.

Matthew Henry Presbyterian @wholebiblehenry

Here is Jacob's honest policy to make his bargain more advantageous to himself than it was likely to be. If he had not taken some course to help himself, it would have been a bad bargain indeed, which he knew Laban would never consider, or rather would be well pleased to see him a loser by, so little did Laban consult any one's interest but his own.

Commenting on Genesis 30:37-43

John Gill Reformed Baptist @doctorgill

And it came to pass, whensoever the stronger cattle did conceive,.... Whose limbs were well compact, and were strong and healthy: that Jacob laid the rods before the eyes of the cattle in the gutters, that they might conceive among the rods; and bring forth party coloured ones, and such as were robust and strong like themselves; and this was another device of Jacob's to...