A.T. Robertson Commentary John 21:12

"Jesus saith unto them, Come [and] break your fast. And none of the disciples durst inquire of him, Who art thou? knowing that it was the Lord." — John 21:12 (ASV)

Break your fast (αριστησατε). First aorist active imperative of αρισταω from αριστον, first to breakfast, as here and then later to dine as in Lu 11:37. What a delightful breakfast of fresh broiled fish just caught (verse 10) with the hush of joyful surprise in the presence of the Risen Lord.

Durst (ετολμα) Imperfect active of τολμαω. The restraint of silence continued.