It wasnarrated from Mu'adh bin Jabal that the Prophet (ﷺ) said:
"Bythe One in Whose Hand is my soul! The miscarried fetus will draghismother by his umbilical cord to Paradise, if she (was patient and)sought reward (for her loss)." (FR)
English reference (FR): Vol. 1, Book 6, Hadith 1609 (FR)
Arabic reference (FR): Book 6, Hadith 1677 (FR)