Hajj is only required once in a lifetime, and the basic principle concerning its actions and rituals is that they are valid, so no second Hajj is required. But if you do Hajj on behalf of your father it will be a naafil deed, and there will be great reward in that for you and for him, if Allaah accepts it from you.
And Allaah is the Source of strength. May Allaah send blessings and peace upon our Prophet Muhammad and his family and companions. End quote.
Standing Committee for Academic Research and Issuing Fatwas
Shaykh ‘Abd al-‘Azeez ibn ‘Abd-Allaah ibn Baaz, Shaykh ‘Abd al-Razzaaq ‘Afeefi, Shaykh ‘Abd-Allaah ibn Ghadyaan.