Gevurot Meyruach Hakodesh 2:41-42

Those, who were mekabel Besuras HaGeulah and welcomed his dvar, submitted to a tevilah of teshuva and there were added in that day nefashot (souls) beerech (approximately, dacht zich) shloshet alafim (three thousand). And they were keseder (constantly) shtark (steadfastly) devoting themselves to the Moshiachʼs pnimiyus (innermost) Torah as handed on by Moshiachʼs Shlichim (emmisaries of the Rebbe, Melech HaMoshiach) and to being mishtatef (involved, joining) in the Messianic Chavurah (fellowship, company, group), and to the tishen (shared meals) with Betzi'at HaLechem (Breaking Bread) at the Seudos Moshiach and to the Tefillos.