On one occasion two old men were going up from Scete to Egypt, and because of the fatigue of the way they sat down on the bank of the river to eat some food, and one of them took his bread-cake in his hand and dipped it in the water; and he answered and said unto his companion, “Wilt thou not dip thy cake in water, O father?” And his companion answered and said unto him, “It is written, When a possession increaseth set not thy heart upon it.” (Psalm 61)

Paradisus Patrum