Reference for Makkot 39:15

הני ד' וה' קריחות ה"ד אילימא בזה אחר זה ובחמש התראות פשיטא

What are the circumstances regarding these four or five bald spots [that we had mentioned]? If you will say that they are one after the other with five separate warnings, then it would be obvious [that he incurs five separate sets of malkus]!

Jastrow