john 7:3 His brethren therefore said unto him, Depart hence, and go into Judaea, that thy disciples also may see the works that thou doest. - Free Bible Online

      3-5. His brethren said--(See on Mt 13:54-56).
      Depart . . . into Judea, &c.--In Joh 7:5 this speech is ascribed to their unbelief. But as they were in the "upper room" among the one hundred and twenty disciples who waited for the descent of the Spirit after the Lord's ascension (Ac 1:14), they seem to have had their prejudices removed, perhaps after His resurrection. Indeed here their language is more that of strong prejudice and suspicion (such as near relatives, even the best, too frequently show in such cases), than from unbelief. There was also, probably, a tincture of vanity in it. "Thou hast many disciples in Judea; here in Galilee they are fast dropping off; it is not like one who advances the claims Thou dost to linger so long here, away from the city of our solemnities, where surely 'the kingdom of our father David' is to be set up: 'seeking,' as Thou dost, 'to be known openly,' those miracles of Thine ought not to be confined to this distant corner, but submitted at headquarters to the inspection of 'the world.'" (See Ps 69:8, "I am become a stranger to my brethren, an alien unto my mother's children!")

JFB.