9 Grk “his brothers.” Jesus’ brothers. Jesus’ brothers (really his half-brothers) were mentioned previously by John in 2:12 (see the note on brothers there). They are also mentioned elsewhere in Matt 13:55 and Mark 6:3.
10 Grk “your deeds that you are doing.” Should the advice by Jesus’ brothers, Leave here and go to Judea so your disciples may see your miracles that you are performing, be understood as a suggestion that he should attempt to win back the disciples who had deserted him earlier (6:66)? Perhaps. But it is also possible to take the words as indicating that if Jesus is going to put forward messianic claims (i.e., through miraculous signs) then he should do so in Jerusalem, not in the remote parts of Galilee. Such an understanding seems to fit better with the following verse. It would also indicate misunderstanding on the part of Jesus’ brothers of the true nature of his mission—he did not come as the royal Messiah of Jewish apocalyptic expectation, to be enthroned as king at this time.

In other versions

So his brothers said to him, “Leave here and go to Judea, that your disciples also may see the works you are doing.

Jesus’ brothers said to him, “Leave Galilee and go to Judea, so that your disciples there may see the works you do.

So his brothers said to him, “Leave here and go to Judea so that your disciples can see your works that you are doing.

and Jesus’ brothers said to him, “Leave here and go to Judea, where your followers can see your miracles!

So his brothers said to him, “Depart from here and go to Judea, so that your disciples also can see your works that you are doing.

His brethren therefore said unto him, Depart hence, and go into Judaea, that thy disciples also may see the works that thou doest.

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