[Machine] The Messenger of Allah ﷺ heard a caller when the prayer was established or when the time for prayer came or something similar urging them to pray in their travels for rain that was approaching.  

سَمِعَ مُنَادِيَ رَسُولِ اللهِ ﷺ حِينَ قَامَتِ الصَّلَاةُ أَوْ حِينَ حَانَتِ الصَّلَاةُ أَوْ نَحْوَ هَذَا أَنْ صَلُّوا فِي رِحَالِكُمْ لِمَطَرٍ كَانَ