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After sh'mone esre (amida) of mincha on most Shabasos, we say three p'sukim, the first of which starts with the word "צדקתך". I've seen this three-pasuk paragraph referred to in Hebrew-language halacha sources as "צו״צ". What does that stand for?
From this Hebrew site explaining abbreviations and acronyms in Hebrew.
צדקתך וצדקתך צדקתך
This Chabad site
explains that צו״צ
stands for the three posukim said on Shabbos mincha.
שלושת הפסוקים שאומרים במנחה בשבת,
which begin with the three words צדקתך, וצדקתך, צדקתך