Were gathered together (sunhcqhsan). First aorist (effective) passive indicative. The church is not named here as in verse Acts 4 , but we know from verses Acts 12-22 that the whole church came together this time also along with the apostles and elders. Of this matter (peri tou logou toutou). Same idiom in Acts 8:21 ; Acts 19:38 . They realized the importance of the issue.