The similitude of a hypocrite is that of a sheep which roams aimlessly between two flocks. She goes to one at one time and to the other at another time.
Sahih Muslim Book 51, Hadith 20
← Previous Hadith We went along with Allah's Messenger (ﷺ) to visit a person suffering from fever. When I placed my hand upon him, I said: By Allah, I have never seen, till this day, a person running higher temperature than he. Thereupon Allah's Apostle (ﷺ), turning his face to his companions, said: May I not inform you of a severer temperature than this which these two persons would run on the Day of Resurrection? And they were two hypocrites riding upon the camel turning their back towards (the Muslims).

Sahih Muslim Book 51, Hadith 19 Next Hadith → " She sometimes finds a way in one flock and then in another flock."

Sahih Muslim Book 51, Hadith 21