That river in Egypt

"Are you serious? You don't know what my biggest rule is? I'm disappointed"
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"It was the first rule that I told you, and I put extra emphasis on it because it carries the most serious punishments for breaking it, which you will never do right?"
"Mmff"
"Right. But you don't even remember what it is"
*WHACK* *WHACK* *WHACK* *WHACK* *WHACK*
"Maybe these will help job your memory"
*WHACK* *WHACK* *WHACK*
"Oh, and subtract 4 points, -4 correct responses"
*WHACK* *WHACK* *WHACK*
"Try again"