Exegesis:

kai exestēsan hoi goneis autēs ‘and her parents were astounded.’ As a comparison with 2.47 shows this is a moderate phrase and less strong than the parallel Mk. 5.42.

parēggeilen ‘he ordered,’ cf. on 5.14.

to gegonos ‘what had happened.’

Translation:

For parents see on 2.27, and for amazed on “wondered” in 1.21.

He charged them to tell no one, cf. on 5.14.

Quoted with permission from Reiling, J. and Swellengrebel, J.L. A Handbook on the Gospel of Luke. (UBS Handbook Series). New York: UBS, 1971. For this and other handbooks for translators see here . Make sure to also consult the Handbook on the Gospel of Mark for parallel or similar verses.