Sundarakānda - Canto 40

Asking Hanumān, who was ready to depart, to remind Śrī Rāma of his having once painted a decorative mark on her cheek with red realgar, and also of how he threw a reed at the crow assailing her, destroying his right eye thereby, as further tokens of Hanumān having met her, and urging him to apprise Śrī Rāma  of her wretched plight, Sītā grants him leave to depart with her blessings.