ב"ה, י"ד מ"ח, תש"ל
ברוקלין, נ.י.
שלום וברכה!
. . . לכתבו ע"ד מנהגי חב"ד בתפלה וכו' – יש לברר אצל זקני אנ"ש שי' שבירות"ו שבטח מסורת אבותיהם בידיהם איך התנהגו בפועל.
ומעשה
רב.
B"H, 14 Iyar, 5730.
Brooklyn, NY.
Shalom u'Vrachah!
... Regarding your writing about the customs of Chabad in prayer, etc.—one should clarify this with the elders of Anash who surely have the traditions of their ancestors in their hands regarding how things were actually done. The actions of great people serve as a precedent.
Summary
The Rebbe teaches that to accurately understand and preserve Chabad prayer customs, one should consult community elders who maintain ancestral traditions and observe established practices.