Arabic (Original)
أَخْبَرَنَا أَبُو سَعِيدٍ ثنا أَبُو الْعَبَّاسِ أنبأ الرَّبِيعُ قَالَ قَالَ الشَّافِعِيُّ وَبَلَغَنِي أَنَّ قَتَادَةَ قَالَ قَالَ رَسُولُ اللهِ ﷺ مَا هَبَّتْ جَنُوبٌ إِلَّا أَسَالَتْ وَادِيًا قَالَ الشَّافِعِيُّ رَحِمَهُ اللهُ يَعْنِي أَنَّ اللهَ خَلَقَهَا تَهُبُّ بُشْرَى بَيْنَ يَدَيْ رَحْمَتِهِ مِنَ الْمَطَرِ
English Translation
Abu Sa'id narrated to us... al-Shafi'i said: It has reached me that Qatadah said: The Messenger of Allah (peace be upon him) said: 'No south wind blows without causing a valley to flow.' Al-Shafi'i (may Allah have mercy on him) said: This means that Allah created it to blow as glad tidings before His mercy of rain.