They all believed/confessed the Word
Acts 16:30 – 31 (KJV) 30And brought them out, and said, Sirs, what must I do to be saved?
31And they said, Believe on the Lord Jesus Christ, and thou shalt be saved, and thy house.
Mark 16:16 (KJV) 16He that believeth and is baptized shall be saved; but he that believeth not shall be damned.
a. Believe means trust and obey:
Acts 26:20 (NASB) 20but kept declaring both to those of Damascus first, and also at Jerusalem and then throughout all the region of Judea, and even to the Gentiles, that they should repent and turn to God, performing deeds appropriate to repentance.
Matt 3:8 (NASB) 8“Therefore bear fruit in keeping with repentance;
Acts 5:32 (NASB) 32“And we are witnesses £of these things; and so is the Holy Spirit, whom God has given to those who obey Him.”
John 8:31 (NASB) 31So Jesus was saying to those Jews who had believed Him, “If you continue in My word, then you are truly disciples of Mine;