Remembering God before sleeping

This hadith explains the importance of remembering Allah before sleeping. It tells us that when we sleep, Satan ties three knots at the back of our neck which can cause us to wake up in bad spirits and sluggish state if we do not remember Allah before sleeping. However, if we remember Him before going to bed then one knot is loosened; if we perform wudu then two knots are loosened; and if we pray then all three knots are loosened so that when we wake up in the morning, our spirits will be refreshed and happy. This hadith teaches us to always remember Allah before going to bed as it has many benefits for us both spiritually and physically.