Acts 1:15

1:15 In those days Peter stood up among the believers (a gathering of about one hundred and twenty people) and said,

Acts 1:23

1:23 So they proposed two candidates: Joseph called Barsabbas (also called Justus) and Matthias.

Acts 1:26

1:26 Then they cast lots for them, and the one chosen was Matthias; so he was counted with the eleven apostles.