1 Grk “Now it happened that.” The introductory phrase ἐγένετο (egeneto, “it happened that”), common in Luke (69 times) and Acts (54 times), is redundant in contemporary English and has not been translated.
2 The Lake of Gennesaret is another name for the Sea of Galilee. Cf. the parallel in Matt 4:18.
3 The image of the crowd pressing around him suggests the people leaning forward to catch Jesus’ every word.

In other versions

On one occasion, while the crowd was pressing in on him to hear the word of God, he was standing by the lake of Gennesaret,

One day as Jesus was standing by the Lake of Gennesaret, the people were crowding around him and listening to the word of God.

As the crowd was pressing in on Jesus to hear God’s word, he was standing by Lake Gennesaret.

One day as Jesus was preaching on the shore of the Sea of Galilee, great crowds pressed in on him to listen to the word of God.

Now it happened that while the crowd was pressing around him and hearing the word of God, he was standing beside the lake of Gennesaret,

And it came to pass, that, as the people pressed upon him to hear the word of God, he stood by the lake of Gennesaret,

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