1187. hadíth
وَقَالَ رَسُولُ اَللَّهِ صَلَّى اَللَّهُ عَلَيْهِ وَ آلِهِ: «مَنْ صَلَّى بِقَوْمٍ فَاخْتَصَّ نَفْسَهُ بِالدُّعَاءِ دُونَهُمْ فَقَدْ خَانَهُمْ.
The Messenger of Allah (saws) said: "Whoever leads a group in prayer and reserves the supplication for himself, excluding them, has betrayed them”.