What is the significance of saying "good night" in Islam before going to sleep?

In Islam, saying "good night" before going to sleep is significant because it is a way to seek protection and blessings from Allah for a peaceful and restful sleep. It is a reminder to end the day with gratitude and mindfulness, and to seek forgiveness for any wrongdoings. Saying "good night" is also a way to express care and love for others before resting, promoting a sense of unity and compassion within the community.