'Fasting' in the Bible

Now in the twenty-fourth day of this month the children of Israel were assembled with fasting, and with sackcloth, and earth on them.

In every province, wherever the king's commandment and his decree came, there was great mourning among the Jews, and fasting, and weeping, and wailing; and many lay in sackcloth and ashes.

But as for me, when they were sick, my clothing was sackcloth. I afflicted my soul with fasting. My prayer returned into my own bosom.

My knees are weak through fasting. My body is thin and lacks fat.

Then the king went to his palace, and passed the night fasting; neither were instruments of music brought before him: and his sleep fled from him.

I set my face to the Lord God, to seek by prayer and petitions, with fasting and sackcloth and ashes.

"Yet even now," says Yahweh, "turn to me with all your heart, and with fasting, and with weeping, and with mourning."