Midrasz do Sędziów 13:5

(Fol. 66) MISHNAH: Samuel the prophet was a Nazarite according to the opinion of R. N'horai, for the passage says: (I Sam. 1, 11) And no razor (moreh) shall come upon his head. It is said concerning Samuel moreh, and it is said concerning Samson (Judges 13, 5) And no razor (moreh) shall come upon his head. Just as the word moreh used in connection with Samson refers to a Nazarite, so also does moreh used in connection with Samnel refer to a Nazarite. Whereupon R. Jose said to him: "Why not say that the word moreh means fear of human beings, as the Targum explains it that he should not have the fear of man." R. N'horai replied to him: "This cannot be so, since the pasage says (I Sam. 16, 2) And Samuel said, 'How shall I go? If Saul should hear it he would kill me.' Hence we see that he was afraid of human beings."