We used to observe the Friday prayer with the Messenger of Allah ﷺ, and when we returned we did not find the shadow of the walls in which we could take protection (from the heat of the sun).
كُنَّا نُصَلِّي مَعَ رَسُولِ اللَّهِ ﷺ الْجُمُعَةَ فَنَرْجِعُ وَمَا نَجِدُ لِلْحِيطَانِ فَيْئًا نَسْتَظِلُّ بِهِ