“And he came to Nazareth, where he had been brought up: and, as his custom was, he went into the synagogue on the sabbath day, and stood up for to read.”
He went to Nazareth, where he had been brought up, and on the Sabbath day he went into the synagogue, as was his custom. He stood up to read — the Nazareth synagogue visit is placed early in Luke's Gospel (in Mark and Matthew it comes much later, after significant ministry elsewhere). As was his custom: Jesus' Sabbath synagogue attendance is a regular practice, not a special occasion. He stood up to read communicates the formal posture for Scripture reading in the synagogue.