In Section 61 of the Khosrow Nameh, Farid al-Din Attar uses the metaphor of the nightingale ('andalib), described as the youth of the garden of creation, to act as the bearer of Gol's letter to Khosrow. The nightingale's multilingual capacity (Turkish, Arabic, and Persian) highlights the universal and expressive nature of love's message. This metaphor aligns with Attar's broader poetic technique of using avian symbols to represent the transmission of spiritual truth and the lover's quest.