Acts 4:3-4

But many who heard the message believed. Jailing Peter and John did not change the minds of those who believed what they had said. To about five thousand. This must include those men who were "buried with Christ" on Pentecost (Acts 2:41). Women were not usually counted (compare Matthew 14:21). [J.G. Malphurs thinks Timothy's mother and grandmother were both "baptized into Christ" on Pentecost, along with his father (who was a Gentile converted to Judaism). He cites the fact that a religious Jewish mother and grandmother did not circumcise Timothy, as evidence pointing toward this.]