Where did you break your oath as Paladin first?

For me:

Oath of Devotion

Broke this knocking out Alfira as Dark Urge so I wouldn't kill her later

Oath of the Ancients

Broke this by allowing Myrna to have her wand to get zombie Conner

Oath of Vengeance

Broke this by failing the intimidate check against the two Tieflings holding Lae'zel hostage