Bulugh al-Maram
Book 2, Hadith 211
Arabic hadith text
وَفِي رِوَايَةٍ لِمُسْلِمٍ : { إِذَا فَرَغَ أَحَدُكُمْ مِنْ اَلتَّشَهُّدِ اَلْأَخِيرِ } 11 - صحيح . رواه مسلم ( 588 ) (130 ) .
Translation
In the narration of Muslim
"When any of you finishes the last Tashahhud."