He prayed Maghrib at Jam, and then Isha, with a single call announcing the start of the prayer. Then he related that Ibn Umar had prayed in just that way, and Ibn Umar related that the Prophet ﷺ had done the same, saying that he prayed the two of them with one call announcing the start of the prayer.
و حدثنيه زهير بن حرب حدثنا وكيع حدثنا شعبة بهذا الإسناد وقال صلاهما بإقامة واحدة