Bara’ bin Azib, one of the companions (Ashab) of the Holy Prophet (s.a.w.s.) says that one day I was in the presence of the Prophet, when we saw a group of people gathered. The Holy Prophet (s.a.w.s.) asked them as to why they had gathered? They replied that they had gathered to dig a grave. As soon as the Prophet heard the name of the grave, he hurried towards it and sat on one side of the grave. I sat on the other side facing him so as to get a clear view of what he did. I saw that the Prophet (s.a.w.s.) started weeping bitterly so much so that his face became wet, then he looked at us and said,
اِخْوَانِى لِمِثْلِ هذَا فَاَعِدُّوْا
“O my brothers! Prepare yourselves for this house.”