Seneca · On taking one's own life

Letters 77.7

Marcellinus did not need someone to urge him, but rather someone to help him; his slaves refused to do his bidding. The Stoic therefore removed their fears, showing them that there was no risk involved for the household except when it was uncertain whether the master’s death was self-sought or not; besides, it was as bad a practice to kill one’s master as it was to prevent him forcibly from killing himself.

Seneca, Letters to Lucilius 77.7, translated by Richard Mott Gummere