Acts 20:21

20:21 testifying ¹  to both Jews and Greeks about repentance toward God and faith in our Lord Jesus. ² 

John 15:27

15:27 and you also will testify, because you have been with me from the beginning.

Hebrews 2:3-4

2:3 how will we escape if we neglect such a great salvation? It was first communicated through the Lord and was confirmed to us by those who heard him, 2:4 while God confirmed their witness ³  with signs and wonders and various miracles and gifts of the Holy Spirit distributed ⁴  according to his will.

¹ tn BDAG 233 s.v. διαμαρτύρομαι 1 has “testify of, bear witness to (orig. under oath)…of repentance to Judeans and Hellenes Ac 20:21.”

² tc Several mss, including some of the more important ones (Ì⁷⁴ א Α C [D] E 33 36 323 945 1175 1241 1505 1739 pm and a number of versions), read Χριστόν (Criston, “Christ”) at the end of this verse. This word is lacking in B H L P Ψ 614 pm. Although the inclusion is supported by many earlier and better mss, internal evidence is on the side of the omission: In Acts, both “Lord Jesus” and “Lord Jesus Christ” occur, though between 16:31 and the end of the book “Lord Jesus Christ” appears only in 28:31, perhaps as a kind of climactic assertion. Thus, the shorter reading is to be preferred.

³ tn Grk “God bearing witness together” (the phrase “with them” is implied).

⁴ tn Grk “and distributions of the Holy Spirit.”