Greeting someone asleep

Al-Miqdad ibn al-Aswad said, "The Prophet ﷺ used to come at night and would give the greeting in such a way that it would not awaken anyone asleep, but the person who was awake would hear it."

حَدَّثَنَا مُوسَى بْنُ إِسْمَاعِيلَ، قَالَ: حَدَّثَنَا سُلَيْمَانُ بْنُ الْمُغِيرَةِ، قَالَ: حَدَّثَنَا ثَابِتٌ، عَنْ عَبْدِ الرَّحْمَنِ بْنِ أَبِي لَيْلَى، عَنِ الْمِقْدَادِ بْنِ الأَسْوَدِ قَالَ: كَانَ النَّبِيُّ ﷺ يَجِيءُ مِنَ اللَّيْلِ، فَيُسَلِّمُ تَسْلِيمًا لاَ يُوقِظُ نَائِمًا، وَيُسْمِعُ الْيَقْظَانَ.