فَخَرَجَ عَلَى قَوْمِهِ مِنَ الْمِحْرَابِThen he came out to his people from the Mihrab,referring to the place where he was given the good news of the child.فَأَوْحَى إِلَيْهِمْhe indicated to them by signs,Meaning he made a gesture to them that was subtle and swift.أَن سَبِّحُوا بُكْرَةً وَعَشِيًّاto glorify (Allah) in the morning and in the afternoon.That they should be agreeable to what he was commanded to do during these three days, to increase in his deeds and gratitude to Allah for what He had given him.Mujahid said, فَأَوْحَى إِلَيْهِمْ (he indicated to them by signs),"He made a gesture."Wahb and Qatadah said the same