לֹֽא־נָאוֶ֣ה לִכְסִ֣יל תַּעֲנ֑וּג אַ֝֗ף כִּֽי־לְעֶ֤בֶד ׀ מְשֹׁ֬ל בְּשָׂרִֽים׃
No conviene al necio el deleite: ¡Cuánto menos al siervo ser señor de los príncipes!
Rashi on Proverbs
Pleasure does not befit a fool, much less a slave It is derived by an a fortiori conclusion that it does not befit a slave to rule over princes.