These things are good in little measure and evil in large; yeast, salt, and hesitation.

The Talmud (AD 200-500) Collection of Jewish rabbinical writings

Babylonian Talmud, Berakoth 34a

Alt. trans.: "Our Rabbis taught: If one is asked to pass before the Ark, he ought to refuse, and if he does not refuse he resembles a dish without salt; but if he persists too much in refusing he resembles a dish which is over-salted. How should he act? The first time he should refuse; the second time he should hesitate; the third time he should stretch out his legs and go down. Our Rabbis taught: There are three things of which one may easily have too much while a little is good, namely, yeast, salt, and refusal."

Alt. trans.: "There are three things that are harmful in excess but are beneficial when used sparingly. They are: Leavening in dough, salt in a cooked dish and refusal for the sake of propriety." [William Davidson Talmud]

Alt. trans.: "There are three things of which you may easily have too much, while a little is good: yeast, salt, and hesitation." [Joshua of the South, Berakot 5.3]

Alt trans.: "Three things are disagreeable when used in excess, and pleasant when moderately indulged in: yeast, salt, and hesitancy in accepting proffered honours." [Paul Isaac Hershon, The Pentateuch According to the Talmud: Genesis, Part 1, Genesis 19:26, Synoptical Notes: "Salt"]