A.T. Robertson Commentary Acts 5:20

"Go ye, and stand and speak in the temple to the people all the words of this Life." — Acts 5:20 (ASV)

And stand (κα σταθεντες). First aorist passive participle (intransitive, ingressive aorist), take a stand. Bold and pictorial command.

All the words of this life (παντα τα ρηματα της ζωης ταυτης). Not just a Hebraism for "all these words of life." Probably "this life" which the Sadducees deny and of which the angel is now speaking, this eternal life. (John 6:63,68; 1 Corinthians 15:19).