Mishkat al-Masabih 4 Prayer كتاب الصلاة 902

وَعَن عبد الله بن زيد أَنَّهُ قَالَ: اسْتَسْقَى رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ وَعَلَيْهِ خَمِيصَةٌ لَهُ سَوْدَاءُ فَأَرَادَ أَنْ يَأْخُذَ أَسْفَلَهَا فَيَجْعَلَهُ أَعْلَاهَا فَلَمَّا ثَقُلَتْ قَلَبَهَا عَلَى عَاتِقَيْهِ. رَوَاهُ أَحْمَدُ وَأَبُو دَاوُدَ

He said God’s Messenger prayed for rain wearing a khamisa* of his. He wanted to reverse it from top to bottom, but when it was too heavy he turned it round on his shoulders. * A black square robe with ornamented borders. Ahmad and Abu Dawud transmitted it.