Moses
Genesis 30:19ESV·traditional attribution

And Leah conceived again, and she bore Jacob a sixth son.

Matthew Henry Presbyterian @wholebiblehenry

Here is, I. Leah fruitful again, after she had, for some time, left off bearing. Jacob, it should seem, associated more with Rachel than with Leah. The law of Moses supposes it a common case that, if a man had two wives, one would be beloved and the other hated, Deu 21:15.

Commenting on Genesis 30:14-24

John Gill Reformed Baptist @doctorgill

And God remembered Rachel,.... In a way of mercy and kindness, whom he seemed to have forgotten, by not giving her children: and God hearkened to her; to her prayer, which had been made time after time, that she might have children; but hitherto God had delayed to answer, but now gives one: and opened her womb; gave her conception, and made her fruitful, and...

Keil & Delitzsch Lutheran @keilanddelitzsch

Gen 30:14-21 The Other Children of Leah. - How thoroughly henceforth the two wives were carried away by constant jealousy of the love and attachment of their husband, is evident from the affair of the love-apples, which Leah’s son Reuben, who was then four years old, found in the field and brought to his mother.

Commenting on Genesis 30:14-21