Our rabbi recently gave a shiur about the number three in Judaism. Moshe was the third son, there were three patriarchs, ... and others that I can not remember. One point was made around the significance of 3 children in a Jewish family, analogous to a tripod providing stability. Can anyone give me some more information?

Thanks and Shabbat Shalom

there are many numbers that have something behind them. Very interesting.

Three is the number given as pi in Kings II.

Shalom Aryeh, numbers carry a lot of weight in Judaism. Do you want some more information on the "number 3" or numbers in general? Take the number 13, for example, which is superstitiousous in most of the non-Jewish world (Think - Friday the 13th, No 13th Floor in many buildings); and look at what the number 13 represents in the Jewish world:

13 Atributes of Faith

13 Ani Ma'amins that which the Rambam put together

13 years (and one day) that a boy becomes a Jewish adult obligated in observing the commandments

13 x 3 = 39 = The 39 Acts that are forbidden to do on Shabbos

13 x 2 = 26 = The numerical value of G-ds 4 letter name - the third word in every blessing.

The list is probably not complete, basically to add to that which Sharona mentioned too.