(20) باب الْكَلاَمِ فِي الصَّلاَةِ
It was narrated that Ibn Mas'ud said:
"We used to greet the Prophet (ﷺ) with salam and he would return our salam, until we came back from the land of Ethiopia. I greeted him with salam and he did not return my greeting,a nd I started to wonder why. So I sat down; and when he finished praying, he said: 'Allah (SWT) decrees what He wills, and He has decreed what we should not speak during the prayer.'" (FR)
Reference (FR): Sunan an-Nasa'i 1221 (FR)
In-book reference (FR): Book 13, Hadith 43 (FR)
English translation (FR): Vol. 2, Book 13, Hadith 1222 (FR)