OET interlinear ACTs 10:48

uW Translation Notes:

Note 1 topic: figures-of-speech / explicit

προσέταξεν & αὐτοὺς & βαπτισθῆναι

(Some words not found in SR-GNT: Προσέταξεν δέ αὐτούς ἐν τῷ ὀνόματι Ἰησοῦ Χριστοῦ βαπτισθῆναι Τότε ἠρώτησαν αὐτόν ἐπιμεῖναι ἡμέρας τινάς)

The implication is that Peter and the believers who accompanied him from Joppa would be the ones to baptize the Gentile believers. If it would be helpful to your readers, you could state that explicitly. Alternate translation: [Peter told the Gentile believers to allow the Jewish Christians to baptize them]

Note 2 topic: figures-of-speech / activepassive

προσέταξεν & αὐτοὺς & βαπτισθῆναι

(Some words not found in SR-GNT: Προσέταξεν δέ αὐτούς ἐν τῷ ὀνόματι Ἰησοῦ Χριστοῦ βαπτισθῆναι Τότε ἠρώτησαν αὐτόν ἐπιμεῖναι ἡμέρας τινάς)

If your language does not use this passive form, you could express the idea in active form or in another way that is natural in your language. Alternate translation: [he commanded them to receive baptism]

Note 3 topic: figures-of-speech / idiom

ἐν τῷ ὀνόματι Ἰησοῦ Χριστοῦ βαπτισθῆναι

in the name ˱of˲_Jesus Christ ˓to_be˒_baptized

Here, in the name is an idiomatic way of saying “on the basis of naming.” Peter commanded Cornelius and his guests to acknowledge Jesus as the Messiah as the basis of their baptism for the forgiveness of their sins, as described in 10:43. See how you translated the similar expression in 2:38. Alternate translation: [on the basis of naming Jesus as the Christ] or [upon acknowledging that Jesus is the Messiah]