Performing Istinja' after Wudu'

The first question of Fatwa no. 6970 What is the ruling on a person who washes his hands, face, arms, and feet i.e. performs Wudu’ (ablution), before cleansing his private parts after urination or defecation; (Part No. 5; Page No. 234) and then after ablution he cleanses his private parts?

All praise be to Allah Alone, and peace and blessings be upon His Messenger, and his family and Companions.In the case mentioned, his Wudu’ will be invalid, because the validity of Wudu’ is conditional upon performing Istinja’ (cleansing the private parts with water) or Istijmar (cleansing the private parts with a hard material) both after urination or defecation and before performing Wudu'. This is according to the more correct of the two opinions held by scholars.May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.