'Fast' in the Bible

from the nations concerning which the Lord had said to the sons of Israel, “You shall not associate with them, nor shall they associate with you, for they will surely turn your heart away after their gods.” Solomon held fast to these in love.

Now she wrote in the letters, saying, “Proclaim a fast and seat Naboth at the head of the people;

They proclaimed a fast and seated Naboth at the head of the people.