6586 – Condolences, Double Consolation, and Teaching at the Kfar Chabad Yeshivah as a Merit for the Departed – תנחומים ונחמה בכפלים, והוראה בישיבה בכפר חב"ד לזכות נשמת הנפטר

This letter consoles the recipient and his family on a tragic passing and blesses them with only revealed good. Since consolation also mends the past, it wishes them a "double" consolation, far more than double in measure, and encourages his teaching at the yeshivah in Kfar Chabad as a merit for the departed and a blessing for the family.

https://www.torahrecordings.com/rebbe/igroskodesh/018/003/6586