28 Grk “speak, because.” A new sentence was started here in the translation, with the words “We do so” supplied to preserve the connection with the preceding statement.
29 Several important witnesses (א C D F G Ψ 1881), as well as the Byzantine text, add κύριον (kurion) here, changing the reading to “the Lord Jesus.” Although the external evidence in favor of the shorter reading is slim, the witnesses are important, early, and diverse (𝔓46 B [0243 33] 629 [630] 1175* [1739] r sa). Very likely scribes with pietistic motives added the word κύριον, as they were prone to do, thus compounding this title for the Lord.

In other versions

knowing that he who raised the Lord Jesus will raise us also with Jesus and bring us with you into his presence.

because we know that the one who raised the Lord Jesus from the dead will also raise us with Jesus and present us with you to himself.

For we know that the one who raised the Lord Jesus will also raise us with Jesus and present us with you.

We know that God, who raised the Lord Jesus, will also raise us with Jesus and present us to himself together with you.

because we know that the one who raised Jesus will also raise us together with Jesus and present us together with you.

Knowing that he which raised up the Lord Jesus shall raise up us also by Jesus, and shall present us with you.

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