Who knows sixty-seven?
Please cite/link your sources, if possible. At some point in the next few days, I will:
Upvote all interesting answers.
Accept the best answer.
Go on to the next number.
The Gemara in Bechoros 8a states that a carob tree takes 70 years from the time it is planted until its fruits develop, and the "gestation period" of the fruit (i.e., the span between when the flowers emerge and when the fruit develop -- Rashi) is three years. Hence, it takes 67 years for a carob tree to flower.