"Never expose yourself unnecessarily to danger; a miracle may not save you…and if it does, it will be deducted from your share of luck or merit." ~~ Traditional Proverb
"Miracles don’t happen every day." ~~ Talmud, Pesachim 50b
"Stand not in a place of danger. saying, “a miracle may happen to me!”" ~~ Talmud, Shabbat
"Hope for a miracle—but don’t depend on one." ~~ (based on) Talmud, Megillah 7b
"One must not rely on miracles happening." ~~ Talmud, Pesachim
"He who depends on a miracle will experience none." ~~ Sefer Hachinukh