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bayhaqi:7493 – Yaḥyá > Isrāʾīl b. Yūnus > Abū Isḥāq > ʿĀṣim b. Ḍamrah > ʿAlī

[Machine] What the sky has watered is one out of every ten, and what has been watered in the west is one out of every twenty.  

البيهقي:٧٤٩٣ – قَالَ وَحَدَّثَنَا يَحْيَى ثنا إِسْرَائِيلُ بْنُ يُونُسَ عَنْ أَبِي إِسْحَاقَ عَنْ عَاصِمِ بْنِ ضَمْرَةَ عَنْ عَلِيٍّ ؓ قَالَ

مَا سَقَتِ السَّمَاءُ فَمِنْ كُلِّ عَشَرَةٍ وَاحِدٌ وَمَا سُقِيَ بِالْغَرْبِ فَمَنْ كُلِّ عِشْرِينَ وَاحِدٌ  

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Collected by Suyūṭī
suyuti:4-2041b – ʿAli
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السيوطي:٤-٢٠٤١b –

"عَنْ عَلِىٍّ قَالَ: مَا سَقَتِ السَّمَاءُ فَمِنْ كُلِّ عَشَرَةٍ وَاحِدٌ، وَمَا سُقِىَ بِالغَرْبِ فَمِنْ كُلِّ عِشْرِينَ وَاحِدٌ".  

[ق] البيهقى في السنن