Jewish tradition mentions that, although the people had to abstain from sexual relations with their wives for only three days prior to the revelation at Mount Sinai (Ex 19:15), Moses chose to remain continent the rest of his life with the full approval of God. The rabbis explained that this was so because Moses knew that he was appointed to personally commune with God, not only at Mount Sinai but in general throughout the forty years of sojourning in the wilderness. For this reason Moses kept himself "apart from woman," remaining in the sanctity of separation to be at the beck and call of God at all times; they cited God's command to Moses in Deuteronomy 5:28 (Midrash Exodus Rabbah 19:3 and 46.3).
Brother Anthony M. Opisso, M.D.
Thanks for your helpful comment. Jewish tradition in this instance seems to contradict the last chapter of Deuteronomy, which specifies that Moses was virile up to the day of his death.
How is this a command about celibacy?