عَنْ أَبِي هُرَيْرَةَ رَضِيَ اللَّهُ عَنْهُ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ: ((لَا إِغْرَارَ فِي صَلَاةٍ وَلَا تَسْلِيمَ))
Sayyiduna Abu Hurairah (may Allah be pleased with him) narrates that the Messenger of Allah (peace and blessings be upon him) said: It is not permissible to cause deficiency in the (acts of) prayer, nor is it permissible to say salam (greeting of peace) in the prayer.