Who knows fifty-one?
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.
Mi Yodeya is a question and answer site for those who base their lives on Jewish law and tradition and anyone interested in learning more. It only takes a minute to sign up.Sign up to join this community
51 are the mitzvos that the Rambam enumerates as related to avodah zarah (idolatry) - the most of any one section of halachos in his Mishneh Torah.
Psalm 27 (לדוד ה אורי) is said during 51 days of the year, outside Israel, according to many Nusach Ashkenaz and Sefard.
It is said staring on 1 Ellul and continues until Shemini Atzeret. 29 days in Elul + 22 days during Tishrei = 51.