Note 173:5 — FAMILIAR QUOTATIONS. (continued 3)
Reading edition
These lines are introduced into Macbeth, act iv. sc. 1. According to Steevens, "the song was, in all probability, a traditional one." Collier says, "Doubtless it does not belong to Middleton more than to Shakespeare." Dyce says, "There seems to be little doubt that 'Macbeth' is of an earlier date than 'The Witch.'"