AnswerIn Matthew's Gospel and Mark's Gospel, Jesus was walking by the Sea of Galilee when he called the brothers, Simon Peter and Andrew.
In Luke's Gospel, Jesus met Simon Peter in a house in Capernaum, where he healed Peter's mother-in-law, and again on a fishing boat, but does not seem to have called him. In Luke chapter 6, Jesus was on a mountain when he called twelve of the disciples who were with him, to be his apostles.
In John's Gospel (1:35-40), Jesus had returned to the place of his baptism, traditionally by the River Jordan, when
John the Baptist pointed him out to two of his disciples, one of whom was Andrew. The disciples followed Jesus and later (1:41-42) Andrew called his brother, Peter, to follow Jesus.
AnswerMatthew 418And Jesus, walking by the
sea of Galilee, saw two brethren, Simon called Peter, and Andrew his brother, casting a net into the sea: for they were fishers.
19And he saith unto them, Follow me, and I will make you fishers of men.
20And they straightway left their nets, and followed him.
21And going on from thence, he saw other two brethren, James the son of Zebedee, and John his brother, in a ship with Zebedee their father, mending their nets; and he called them.
22And they immediately left the ship and their father, and followed him.
Mark 116Now as he walked by the
sea of Galilee, he saw Simon and Andrew his brother casting a net into the sea: for they were fishers.
17And Jesus said unto them, Come ye after me, and I will make you to become fishers of men.
18And straightway they forsook their nets, and followed him.
19And when he had gone a little farther thence, he saw James the son of Zebedee, and John his brother, who also were in the ship mending their nets.
20And straightway he called them: and they left their father Zebedee in the ship with the hired servants, and went after him.
Luke 51And it came to pass, that, as the people pressed upon him to hear the word of God, he stood by the
lake of Gennesaret [Sea of Galilee],2And saw two ships standing by the lake: but the fishermen were gone out of them, and were washing their nets.
3And he entered into one of the ships, which was Simon's, and prayed him that he would thrust out a little from the land. And he sat down, and taught the people out of the ship.
4Now when he had left speaking, he said unto Simon, Launch out into the deep, and let down your nets for a draught.
5And Simon answering said unto him, Master, we have toiled all the night, and have taken nothing: nevertheless at thy word I will let down the net.
6And when they had this done, they inclosed a great multitude of fishes: and their net brake.
7And they beckoned unto their partners, which were in the other ship, that they should come and help them. And they came, and filled both the ships, so that they began to sink.
8When Simon Peter saw it, he fell down at Jesus' knees, saying, Depart from me; for I am a sinful man, O Lord.
9For he was astonished, and all that were with him, at the draught of the fishes which they had taken:
10And so was also James, and John, the sons of Zebedee, which were partners with Simon. And Jesus said unto Simon, Fear not; from henceforth thou shalt catch men.
11And when they had brought their ships to land, they forsook all, and followed him.
John's Gospel does not mention their calling. So the unanimous answer in all the Gospel accounts covering the event is that Jesus was on the shores of the Sea of Galilee when He called the first disciples.