Luke 4:20
Then he rolled up the scroll, gave it back to the attendant and sat down. The eyes of everyone in the synagogue were fastened on him — the rolling up of the scroll, returning it to the attendant, and sitting down are the formal actions of completing the reading and beginning the exposition. Teachers sat to teach in the synagogue tradition (cf. Matthew 5:1). The eyes of everyone fastened on him communicates the electrified expectation — the congregation senses that something important is about to be said.