(7) باب تَحْرِيمِ الْكَلاَمِ فِي الصَّلاَةِ وَنَسْخِ مَا كَانَ مِنْ إِبَاحَتِهِ
Zaid b. Arqam reported:
We used to talk while engaged in prayer and a person talked with a companion on his side in prayer till (this verse) was revealed:" And stand before Allah in devout obedience" (ii, 238) and we were commanded to observe silence (in prayer) and were forbidden to speak.
Reference: Sahih Muslim 539 a
In-book reference: Book 5, Hadith 43
USC-MSA web (English) reference(deprecated numbering scheme): Book 4, Hadith 1098