Schwurhand

The Schwurhand (German pronunciation: [ˈʃvuːɐ̯hant], "swear-hand"; Dutch: spreekgebaar) is a heraldic charge depicting the hand gesture that is used in Germanic Europe and neighbouring countries, when swearing an oath in court, in office, or in swearing-in.

The thumb is shown slightly curled or raised.

Recruits of the Pontifical Swiss Guard at the Vatican City use the sign when swearing their oath of allegiance to the Pope, in a ceremony performed on 6 May every year since the Sack of Rome in 1527.

[1] Depictions of the Rütli Oath or Rütlischwur, the legendary founding oath of the Old Swiss Confederacy in the 13th century, show the participants using this gesture.

[2] The people elected at the Swiss Federal Assembly and at the Swiss Federal Council traditionally use the Schwurhand for their oath of office (and say 'I swear').