John 21:3

Peter and divers others were fishermen, as we have formerly heard, and had boats which they so employed. Though they were called to the work of the ministry, yet, churches not yet being gathered and constituted able to maintain them, they did not judge it unlawful to employ themselves in honest vocations, which might bring in something of a livelihood; no more did Paul afterward. The others resolve to go with Peter. They went, but that night caught nothing; the providence of God so ordering it, that Christ's Divine power might be seen in commanding fish into their nets.