Valmiki Ramayana Ayodhya Kanda Sarga 44 Shloka 10

चन्द्रमा the Moon, रात्रौ at night, अनघं sinless man, शयानम् while asleep, शीतैः cool, रश्मिभिः with rays, संस्पृशन् while touching, पितेव like father, अभिपरिष्वजन् while embracing, आह्लादयिष्यति delight.

While that sinless Rama sleeps at night, the Moon will comfort him by touching him with cool beams like a father embracing his son.