Vincent's NT Word Studies
4. Out of every city (kata polin). City by city.Were come (epiporeuomenwn). The present participle denoting something in progress. They kept coming. Rev., resorted.
Robertson's NT Word Studies
8:4 {By a parable} (dia paraboles). #Mr 4:2 says "in parables" as does #Mt 13:3. this is the beginning of the first great group of parables as given in #Mr 4:1-34 and #Mt 13:1-53. There are ten of these parables in Mark and Matthew and only two in #Lu 8:4-18 (The Sower and the Lamp, #8:16) though Luke also has the expression "in parables" (#8:10). See #Mt 13 and #Mr 4 for discussion of the word parable and the details of the Parable of the Sower. Luke does not locate the place, but he mentions the great crowds on hand, while both Mark and Matthew name the seaside as the place where Jesus was at the start of the series of parables.