وَعَنْ أَنَسٍ أَنَّ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ كَانَ إِذَا صَافَحَ الرَّجُلَ لَمْ يَنْزِعْ يَدَهُ مِنْ يَدِهِ حَتَّى يَكُونَ هُوَ الَّذِي يَنْزِعُ يَدَهُ وَلَا يَصْرِفُ وَجْهَهُ عَنْ وَجْهِهِ حَتَّى يَكُونَ هُوَ الَّذِي يَصْرِفُ وَجْهَهُ عَن وَجهه وَلم يُرَ مقدِّماً رُكْبَتَيْهِ بَين يَدي جليس لَهُ. رَوَاهُ التِّرْمِذِيّ
Anas told that when God's messenger shook hands with a man, he did not withdraw his hand till the other did so, he did not turn his face away till the other did so, and he was not seen to put forward his knees in front of one with whom he was sitting. Tirmidhi transmitted it.