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
Sefer Hamaamarim 5692-5693
Chasidic Discourses of the Previous Chabad Rebbe, Rabbi Yosef Yitzchak Schneersohn delivered during the years of 5692-5693 / 1932-1933.