3921 – Never Give Up Hope for Children, the Importance of This Mitzvah – קיינמאל נישט אויפגעבן האפענונג אויף קינדער, חשיבות פון דער מצוה

The Rebbe writes that one must never give up hope of having children, as this is among the most important mitzvos. He encourages strong trust in G-d, prayer, and faith that the right time will come, emphasizing G-d's unlimited power and desire for good. https://www.torahrecordings.com/rebbe/igroskodesh/012/003/3921