The answer is found in the chronology of the scriptures. Matthias is first mentioned in Acts 1:23 and then later in Acts 1:26. Barnabas is not mentioned until 4:36 and then later in chapter 9. Acts 1 describes how the disciples choose lots to find a replacement for Judas. Matthias was selected but we know nothing about him before this time or afterwards. He must have been a faithful servant, someone like Stephen. The first mention of Barnabas is when he gave all his possessions to the church in Chapter 4. It wasn't until Chapter 9, many years later, that he goes on a mission with Paul. I find it interesting that the apostles felt the need to replace Judas. Why? Most people interpret the events to mean that this decision was wrong to make and God had plans to raise up a 12th apostle through Paul. However, drawing of lots was quite common method to make decisions at that time and even centuries later(however, not normal for the Church).
Matthias, who was chosen to replace Judas (Acts 1:15-26), Paul and Barnabas (Acts 14:14).
Matthias the Apostle was chosen to replace Judas Iscariot as one of the Twelve Apostles. Before being chosen, Matthias was a witness to Jesus's ministry and resurrection.
All of the disciples were present at the beginning of the last supper, but Judas left early in order to meet with the Jewish leaders to betray Jesus. He later committed suicide and Matthias was chosen as his replacement.
Matthias was the disciple chosen to replace Judas.
Before Matthias died and entered heaven as a saint he was the apostle chosen to replace Judas.
Matthias was chosen by the disciples to replace Judas (Acts 1:26).
Matthias became the apostle who was selected to replace Judas
The appointment of Saint Matthias as apostle was unique because it was not made personally by Jesus. Instead, he was chosen by the remaining eleven apostles to replace Judas.
Saint Matthias was chosen by the remaining disciples to replace Judas Iscariot as one of the twelve apostles after Judas' betrayal of Jesus. He is known for spreading the Gospel after witnessing the resurrection of Jesus and is considered a saint in the Christian tradition. Saint Matthias is often celebrated on May 14th in the liturgical calendar.
Matthias was the replacement for Judas Iscariot.
Matthias was chosen by the disciples to replace Judas (Acts 1:26).
The account of Matthias being chosen to replace Judas Iscariot is found in Acts 1:15-26.