[ז' שבט, תשי"ז]
...עבוה"ק בהפצת הדא"ח מסגולותי' הולדת בנים, וכמובן באגה"ק של אדה"ז הנדפסת בסי' מאה שערים (ח"ב לב, א) גנזי נסתרות (ח"ג, ס"א) ועוד.
Zayin Shevat, 5717.
...Working in disseminating Chassidic teachings is among its segulos (spiritual remedies) for giving birth to children, as is evident in the Igros Kodesh of the Alter Rebbe printed in Siman Meah Shearim (Vol. II, p. 32a), Ginzai Nistaros (Vol. III, p. 61), and elsewhere.
Summary
Spreading Chassidic teachings is highlighted here as a spiritual means to merit children, based on sources from the Alter Rebbe's letters.