Mark 3:19

xii. Judas Iscariot sometimes called the son of Simon(John 6:71; John 13:2; John 13:26), more generally Iscariot, i. e. probably "a native of Kerioth" a little village in the tribe of Judah (Joshua 15:25; Jeremiah 48:24). For the probable motives that led him to become the traitor, see note on Mark 14:10.

and they went into an house The incident here related took place after the delivery of the Sermon on the Mount, and the Saviour's second ministerial journey, an interval of a few months (?).