Expositor's Bible Commentary Commentary Matthew 26:72

"And again he denied with an oath, I know not the man." — Matthew 26:72 (ASV)

Peter “went out” to the gateway, apparently retiring from the brighter light of the fire into the darkness of the forecourt. There he denies another accusation, invoking a solemn curse on himself if he is lying and professing his truthfulness by appealing to something sacred .