I said, I will guard my ways, that I may not sin with my tongue. I set a guard over my mouth
Pope Clement VIII, Jerome's Prefaces, On Worship
I. THE HELMETED PROLOGUE.— Jerome quotes this as his own resolve against detractors, asking for the prayers of the faithful
"I said, I will guard my ways, that I may not sin with my tongue. I set a guard over my mouth, when the sinner stood against me. I was silent and was humbled, and kept silence even from good things."