Sundarakānda - Canto 3

Appearing in person before Hanumān, while he was making his way into Lankā at night, the mighty ogress, Lankā, presiding over the city, stops him, striking him with the palm of her hand. Getting unnerved, even though gently smitten with his left fist, she permits the monkey to enter, repeating the words of Brahmā, the creator, that the destruction of Lankā should be concluded as imminent when she is overpowered by a monkey