Ubaydullah bin Muslim al-Hadrami (may Allah have mercy on him) narrates from Sayyiduna Mu'adh bin Jabal (may Allah be pleased with him) that he said: I heard the Messenger of Allah (peace and blessings be upon him) say: "There is no Muslim couple who lose three of their children but that Allah, by the grace of His mercy, admits their parents into Paradise." The Companions said: And two, O Messenger of Allah? He (peace and blessings be upon him) said: "And two as well." The Companions said: And one, O Messenger of Allah? He (peace and blessings be upon him) said: "And one as well." Then he (peace and blessings be upon him) related that: "The miscarried child will drag its mother by its umbilical cord (even) into Paradise."
Hadith Referenceالمعجم الكبير للطبراني / باب الميم / 17435