It was at that time that the poem that shone so brightly at the foot of my bed.

It is from Li Bai's Thoughts on a Quiet Night, which was written around September 15th in 726 AD (14th year of Emperor Xuanzong of the Tang Dynasty). Li Bai was 26 years old and was writing at Yangzhou Guest House. His poem "Walking in the Autumn Night" should be a sequel to "Thinking about a Quiet Night" and was written in the same place. Li Bai wrote this famous poem "Thinking about a Quiet Night".