Character Creation – What 3.5e power / spell / ability does you know if you are breaking a vow / the rules of your god as a free action?

I build a D & D 3.5e clergyman in the monastery with a vow of poverty and the vow of peace. In the last two weeks, I've come across a character ability (an ability, a talent, a spell, an alternate class function, a domain skill, or something else) that had the following wording:

as a free act, you can consult your intuition and know if something is in tune with your God's will (or make a vow, I'm not sure what the benefit is)

I explicitly recall that this was a free action that allowed you to check the status of a contemplated action. But I spent 3 hours searching through the book of sublime deeds, the player's manual, and Google, and can not find it.