Before Shvuos, 5742
[May, 1982]

In response to the 13th installment of My Encounter with the Rebbe:

Translation

All of the above have been received with many thanks, and their arrival should be in a good and auspicious time.

A special mazal tov for your thirteenth “Encounter.” The importance of this number – maturity – is well known, and the importance of the number twenty being complete maturity – is also well known (see Likutei Torah, Bamidbar 2:1).

(Rashi also explains on the verse in chapter 1, verse 3 that not until one has reached the age of twenty was he eligible to join the army and to be counted as a fully matured adult.)