One who refrains from sin is rewarded like one who performs a mitzvah
See: "Whoever brings a transgression to his hand and does not perform it - he has committed a great commandment."
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Translation
Expression (Hebrew)
יָשַׁב וְלֹא עָבַר עֲבֵירָה- נוֹתְנִים לוֹ שָׂכָר כְּעוֹשֶׂה מִצְוָה
Definition (Hebrew)
רְאֵה: "מִי שֶׁבָּאָה עֲבֵירָה לְיָדוֹ וְלֹא עֲשָׂאָהּ-מִצְוָה גְּדוֹלָה עֲשֵׂה".
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