Al-Matalib al-'Aliyah 138 — Wudu after touching the private part

It is narrated from Qatadah (may Allah have mercy on him) that he asked Sa'id bin al-Musayyib (may Allah have mercy on him) about touching the private part, and he said: "It is just a part of the body like your other limbs."
This report (athar) is sahih (authentic), and it states the juristic position of the eminent Successor Sa'id bin al-Musayyib (may Allah have mercy on him) that touching the private part does not invalidate ablution, because it too is an ordinary part of the body.