'Fast' in the Bible

“Go, gather all the Jews that are present in Susa, and observe a fast for me; do not eat or drink for three days, night or day. I and my maids also will fast in the same way. Then I will go in to [see] the king [without being summoned], which is against the law; and if I perish, I perish.”

On the third day [of the fast] Esther put on her royal robes and stood in the inner court of the king’s palace opposite his [throne] room. The king was sitting on his royal throne, facing the [main] entrance of the palace.