Tafseer Ibn Kathir of MARYAM [11]

فَخَرَجَ عَلَى قَوْمِهِ مِنَ الْمِحْرَابِ فَأَوْحَى إِلَيْهِمْ أَن سَبِّحُوا بُكْرَةً وَعَشِيًّا

So he came out to his people from the prayer chamber and signaled to them to exalt [ Allah ] in the morning and afternoon.