And when he had considered [the thing], he came to the house of Mary the mother of John, whose surname was Mark; where many were gathered together praying.
Berean Study Bible (BSB) - Acts 12:12 >And when he had realized this, he went to the house of Mary the mother of John, also called Mark, where many people had gathered together and were praying.
Textus Receptus (TR) - Acts 12:12 >Συνιδών τε ἦλθεν ἐπὶ τὴν οἰκίαν Μαρίας τῆς μητρὸς Ἰωάννου τοῦ ἐπικαλουμένου Μάρκου, οὗ ἦσαν ἱκανοὶ συνηθροισμένοι καὶ προσευχόμενοι.