Hadith 141B

قَالَ يَحْيَى : وَسُئِلَ مَالِك ، عَنْ غَسْلِ الْفَرْجِ مِنَ الْبَوْلِ وَالْغَائِطِ هَلْ جَاءَ فِيهِ أَثَرٌ ؟ فَقَالَ : بَلَغَنِي أَنَّ بَعْضَ مَنْ مَضَى كَانُوا يَتَوَضَّئُونَ مِنَ الْغَائِطِ ، وَأَنَا أُحِبُّ أَنْ أَغْسِلَ الْفَرْجَ مِنَ الْبَوْلِ
Imam Malik, may Allah have mercy on him, was asked: Is there any hadith regarding performing istinja with water after urination or defecation? He replied: It has reached me from some of the Salaf that they used to perform istinja with water after defecation, and I consider it good to perform istinja with water after urination.
Hadith Reference موطا امام مالك رواية يحييٰ / كتاب الطهارة / 141B
Hadith Takhrij «شركة الحروف نمبر: 130، فواد عبدالباقي نمبر: 2 - كِتَابُ الطَّهَارَةِ-ح: 112»