It is narrated from Sayyiduna Abu Hurayrah (may Allah be pleased with him): "Whoever touches his private part, let him perform ablution; and whoever touches it over the clothing, there is no ablution upon him."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الطهارة / 643
Hadith Gradingمحدثین:ضعيف
Hadith Takhrij«ضعيف۔ أخرجه ابو نعيم في الحلية 9/44»