prime of the morning

Who look for some revelation, Some hint of the strange apocalypse, Which the wit of this man, living So near to the prime of the morning, So near to the gates of the azure, The awful gates of the Unseen— Whence all that is seen proceeded— Hath wrought in this new-found country!

There’s the very prime of the morning gone long before that time. 

Upon a certain day, in the prime of the morning, he came across a hilltop, and beheld beneath him a valley, very fertile and well-tilled, with fields and meadow-lands spread all over it like to a fair green carpet woven in divers patterns.