Rabbi Shimon ben Yohai gave good advice to a couple that had not been blessed with children and wished to separate. This advice rekindled their love for each other, and ultimately they were also blessed with a child.

We learned: If a man married a woman and remained with her for ten years but she did not bear children, he is not permitted to remain idle [from the mitzva of procreation any longer. He must divorce his wife and marry another woman].

Rabbi Idi said: There was an incident involving a certain woman in Tzaidan who remained with her husband ten years but did not bear children. The couple came to Rabbi Shimon ben Yohai and said: We wish to leave each other. He said to them: I take an oath by your lives that just as you were joined to each other at your wedding feast with food and drink, so you will separate from each other only through food and drink.

They followed his advice and arranged a celebration for themselves, and prepared a great feast. The wife intoxicated her husband too much. When the husband came to his senses, he said to his wife: My daughter, [now that we are separating,] see any fine item that I have in the house; take it and go to your father’s house. What did she do? After he was already sleeping, she signaled to her servants and maidservants and said to them: Carry him in the bed, and take him to my father’s house.

In the middle of the night, he awakened. Since the effects of the wine had dissipated, he said to his wife: My daughter, where am I? She said to him: In my father’s house. He said to her: What am I doing in your father’s house? She explained: Didn’t you say to me in the evening: Any fine item that I have in the house, take it and go to your father’s house? There is no item in the world that is as good for me as you.

They went to Rabbi Shimon ben Yohai, and he stood and prayed for them; and they were remembered by God, and had a child. This is to teach you: Just as the Holy One, blessed be He, remembers barren women and blesses them with children, so too the righteous cause barren women to be remembered.

The matters can be inferred a fortiori: If a flesh-and-blood person, merely for saying to another flesh-and-blood person: There is no item in the world that is as good for me as you, was remembered by God, then Israel, which awaits the salvation of the Holy One, blessed be He, every day and says to Him: There is no item in the world that is as good for us as You, all the more so will God remember them and have compassion on them. (Shir HaShirim Rabba 1)