In Parashat Miketz we read of another cry that was not heard. Upon recognizing his brothers, Joseph accuses them of being spies. He first threatens to jail all but one of his brothers and send the remaining one to bring back Benjamin with him. He then relents and requires only one of them, Simeon, to remain as hostage while the others bring food to their families and then return with their youngest brother. After their release the brothers ruminate on the cause of their adversities. “They said to one another, ‘Alas, we are being punished on account of our brother, because we looked upon his anguish, yet paid no heed as he pleaded with us. That is why his distress has come upon us’” (Gen. 42:21). - R' Eliezer Diamond
We are not dealing here with weeping of mourning, and not with nostalgic yearning for what once was and is no more, but rather with bekhi tamrurim, which rises upwards and faces the future! This bekhi tamrurim stands like a road sign and sends out directions, both to the children, who are asked to return home, and to God, who is asked to return the children to their own border. Therefore, this weeping of Rachel is called by an unusual term: pe'ula, "work," as is stated in the verse: "Keep your voice from weeping, and your eyes from tears, for your work (pe'ulatekh) shall be rewarded." At first glance, it is strange to refer to weeping by the term pe'ula, which denotes creative activity. But the truth is that Rachel's weeping is "functional weeping" that does its job and does not rest – neither for the Father nor for the children – until they return home.
-Rav Chanan Porat