Ramban

AND JACOB’s ANGER WAS KINDLED. It is not in the power of the righteous that their prayer be heard and answered in any case, and because she spoke in the manner of yearning women who are loved, thus attempting to frighten him with her death, his anger was kindled. Therefore, he said to her that he is not in G-d’s stead that he should remember the barren ones by giving them children in any case, and he does not care about it since it is from her that children were withheld and not from him. He said this in order to admonish her and shame her. Now the righteous woman Rachel, seeing that she could not rely upon Jacob’s prayer, then went to pray on her own behalf to Him Who hears the cry of those in trouble. This is the sense of the verse, And G-d hearkened to her. Perhaps we can rectify Jacob’s retort in consonance with the opinion of our Rabbis [who related that Jacob said to Rachel, “It is from you that He has withheld children and not from me,”] for it is impossible to think that Jacob did not pray on behalf of his beloved wife who was barren, however his prayer was not accepted. Now Rachel came to him with a pretext saying that he should, in any case, give her children through his prayer for he is not of less stature than his father who did so. At this, his anger was kindled and he said to her that the matter is up to G-d and not to him, and that his father’s prayer was heard because he was a righteous man and was destined to have children, but here it is from her that He has withheld children. This is a correct interpretation.