Devout Chaplain

• WWizards of the Coast2012-05-01
  Official Ruling
  You can tap any two untapped Humans you control, including ones you haven’t controlled continuously since the beginning of your most recent turn, to pay the cost of Devout Chaplain’s activated ability. You must have controlled Devout Chaplain continuously since the beginning of your most recent turn, however.

Rulings via Scryfall