مِشْكَاةُ الْمَصَابِيحِ
Mishkat al-Masabih 954
Prayer
The Supplication of the Tashahhud - Section 2
وَعَنْ أَنَسٍ: أَنَّ النَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ حَضَّهُمْ عَلَى الصَّلَاةِ وَنَهَاهُمْ أَنْ يَنْصَرِفُوا قَبْلَ انْصِرَافِهِ مِنَ الصَّلَاةِ. رَوَاهُ أَبُو دَاوُدَ
Anas said that the Prophet (ﷺ) urged them to pray and forbade them to leave after prayer before he did. Abu Dawud transmitted it.
Mishkat al-Masabih, 954صَحِيح (الألباني)