A short riddle rhyme describing something that fills a hill and a hole yet can never be caught in a bowl. The answer is mist, and it rewards a pause before you give it away.
From Mother Goose / Nursery Rhymes (traditional). See the whole collection.
A hill full, a hole full,
Yet you cannot catch a bowl full.
Public domain. Text from The Real Mother Goose (Blanche Fisher Wright, 1916), via Project Gutenberg. View the source edition