A.T. Robertson Commentary John 21:6

"And he said unto them, Cast the net on the right side of the boat, and ye shall find. They cast therefore, and now they were not able to draw it for the multitude of fishes." — John 21:6 (ASV)

The right side (εις τα δεξια μερη). Jesus knew where the fish were. For "net" (δικτυον) see Mt 4:20, here alone in John.

Were now not able to draw it (ουκετ αυτο ελκυσα ισχυον). Imperfect active picturing the disciples tugging at the net.