Do not deprive each other, unless by agreement for a set time, that you may renew zerizut (diligence) to tefillah (prayer) and again you may be together, lest Hasatan lead you into nissayon (temptation) because of your lack of shlitah atzmi (self-control). [SHEMOT 19:15; SHMUEL ALEF 21:4,5]