Two lines warning that Tommy's tears and Mary's fears will make them old before their years. More a moral aside than a story, short enough to slip between longer rhymes.
From Mother Goose / Nursery Rhymes (traditional). See the whole collection.
Tommy's tears and Mary's fears
Will make them old before their years.
Public domain. Text from The Real Mother Goose (Blanche Fisher Wright, 1916), via Project Gutenberg. View the source edition