عَنْ عَائِشَةَ رَضِيَ اللَّهُ عَنْهَا قَالَتْ: كَانَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ يُصَلِّي فِي الْحُجْرَةِ وَأَنَا فِي الْبَيْتِ فَيُفْصِلُ بَيْنَ الشَّفْعِ وَالْوِتْرِ بِتَسْلِيمٍ يُسْمِعُنَاهُ
Sayyidah Aisha (may Allah be pleased with her) says that the Messenger of Allah (peace and blessings be upon him) used to pray in the chamber and I would be in the house. When he (peace and blessings be upon him) would separate the two and one rak'ah of Witr by saying salam, he would make us hear that salam.