Jesus did not go to the Feast of the Tabernacles with his brothers but went undercover. Those who met him were not show it was him or not. Midway through the week he speaks to them as the new Moses who leads them to the promised land of heaven.
“O God, save me by your name; by your power, defend my cause; O God, hear my prayer, give ear to the words of my mouth.” (Cf. Ps. 53:3-4)