1 Kings 21:9צוֹם
In the letters she wrote: “Proclaim a fast and give Naboth a seat of honor among the people.
Esther 4:3וְצוֹם
In every province to which the king’s command and edict came, there was great mourning among the Jews. They fasted, wept, and lamented, and many lay in sackcloth and ashes.
Psalm 35:13בַצּוֹם
Yet when they were ill, I put on sackcloth; I humbled myself with fasting, but my prayers returned unanswered.
Isaiah 58:3צֹמְכֶם
“Why have we fasted, and You have not seen? Why have we humbled ourselves, and You have not noticed?” “Behold, on the day of your fast, you do as you please, and you oppress all your workers.
Joel 1:14צוֹם
Consecrate a fast; proclaim a solemn assembly! Gather the elders and all the residents of the land to the house of the LORD your God, and cry out to the LORD.
Zechariah 8:19צוֹם
“This is what the LORD of Hosts says: The fasts of the fourth, the fifth, the seventh, and the tenth months will become times of joy and gladness, cheerful feasts for the house of Judah. Therefore you are to love both truth and peace.”

Brown-Driver-Briggs

צוֹם n.m. fasting, fast

Sources: Brown-Driver-Briggs (1906, public domain) from the Open Scriptures Hebrew Lexicon (CC BY 4.0), glosses from STEPBible TBESH (CC BY 4.0); STEPBible TAHOT (Hebrew Bible, Leningrad Codex, CC BY 4.0); the Berean Standard Bible (public domain). Reformatted by Word Study, wording unchanged. All sources and licenses.