'Fast' in the Bible

And the mariners were afraid, and cried every one unto his god; and they cast forth the wares that were in the ship into the sea, to be lightened of them. But Jonah had gone down into the lower part of the ship; and he lay, and was fast asleep.

And the men of Nineveh believed God, and proclaimed a fast, and put on sackcloth, from the greatest of them even to the least of them.