ENOfficial
Anas said: A shower of rain fell when we were with God’s Messenger, so he removed his garment till some of the rain fell on him. We asked him why he did this, and he replied, “Because it has recently been with its Lord." Muslim transmitted it.
Source: sunnah.com
Other translations
Arabic
وَعَن أنس قَالَ: أَصَابَنَا وَنَحْنُ مَعَ رَسُولِ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ مَطَرٌ قَالَ: فَحَسَرَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ ثَوْبَهُ حَتَّى أَصَابَهُ مِنَ الْمَطَرِ فَقُلْنَا: يَا رَسُولَ اللَّهِ لِمَ صَنَعْتَ هَذَا؟ قَالَ: «لِأَنَّهُ حَدِيثُ عَهْدٍ بربه» . رَوَاهُ مُسلم
sunnah.com