ספר שיחות מוהר"ן אות - ש

I heard in his name that he said that the essential service of a Jewish man is in winter to rise at midnight.[469] And in summer when the night is very short — when they do not rise at midnight (outside the Land of Israel)[470] as is explained elsewhere — then one should be careful to rise early in the morning at dawn. 469. RAK: See Magen Avraham 1:4. 470. RAK: Likutay Moharan 149; Likutay Halachos, Orach Chaim, Rosh HaShanah Law 3; Shaaris Yisrael, section 125.