A certain man fell ill, and, being in a very bad way, he made a vow that he would sacrifice a hundred oxen to the gods if they would grant him a return to health. Wishing to see how he would keep his vow, they caused him to recover in a short time. Now, he hadn’t an ox in the world, so he made a hundred little oxen out of tallow and offered them up on an altar, at the same time saying, “Ye gods, I call you to witness that I have discharged my vow.”
The gods determined to get even with him, so they sent him a dream, in which he was bidden to go to the seashore and fetch a hundred crowns which he was to find there.
Do not promise more than you can perform.