One who contributes from his wealth for the purpose of writing or publishing a sefer of a Tzaddik –
Behold, at any given time, and in any corner of the world, that a person studies from this sefer, the Tzaddik [on high] evokes merit on behalf of the donor through whom the sefer was disseminated.
—The Rebbe, Igrot Kodesh, vol 2
Siddur Rabbeinu Hazaken
Compiled by Rabbi Levi Y. Raskin
A definitive and encyclopedic work, this Siddur offers citations and explanations of the sources and reasoning behind Rabbi Schneur Zalman's rulings about halacha, prayer phraseology, and pronunciation. The work features hundreds of observations curated from the writings of the Chabad Rebbes.