I have been married for nine years. I made the mistake by having anal sex nine times with my wife, but I stopped this. I am very sad for what I did. What must I do? I will do it.

Praise be to Allah, the Lord of the Worlds; and may His blessings and peace be upon our Prophet Muhammad and upon all his Family and Companions. Anal sex is strictly prohibited. But as long as you have repented to Allah, know that He forgives anyone who repents no matter how great his sin and regardless of how many times he had committed it before repenting. Allah Says (interpretation of meaning): {And verily, I am indeed Forgiving to him who repents, believes (in My Oneness, and associates none in worship with Me) and does righteous good deeds, and then remains constant in doing them, (till his death).}[20: 82]. He also Says (interpretation of meaning): {Say: "O 'Ibâdî (My slaves) who have transgressed against themselves (by committing evil deeds and sins)! Despair not of the Mercy of Allâh, verily Allâh forgives all sins. Truly, He is Oft-Forgiving, Most Merciful.}[39: 53]. So, thank Allah for your repentance and adhere to that. We ask Allah to protect us and you from apparent as well as disguised sins and bad deeds. Allah knows best.