2861 – Shavuos All-Night Vigil, Rashab's Custom, and Guidance on Prayer After Sleep – ההתעוררות כל הלילה בשבועות, מנהגו של הרש"ב, והדרכה על תפילה לאחר שינה

The Rebbe responds to a question about whether one should pray immediately after staying up all night on Shavuos or sleep first, citing the Rashab's occasional practice of sleeping before prayer. He also addresses storytelling sources and encourages kindness and perseverance. https://www.torahrecordings.com/rebbe/igroskodesh/009/012/2861