משנה אויף שמואל א 1:11

Samuel was a nazirite, according to the words of Rabbi Nehorai, as it says, “And no razor [morah] shall come upon his head” (I Samuel 1:11). It says with reference to Samson, “And [no] razor [morah]” (Judges 13:5) and it says with reference to Samuel, “And [no] razor [morah]”, just as “razor [morah]” in the case of Samson [teaches that he was] a nazirite, so “razor [morah]” in the case of Samuel [teaches that he was] a nazirite. Rabbi Yose says: but does not “morah” refer to [fear] of flesh and blood? Rabbi Nehorai said to him: But does it not also say, “And Samuel said; ‘How can I go? If Saul will hear it he will kill me’” (I Samuel 16:2) [which shows] that he was afraid of flesh and blood?