What is the ruling on a man having anal intercourse with his wife? Is what is written on your website, that it is permissible based on the the Hadith of Ibn Umar, correct?

"Engaging in anal sex with a woman is a major and repulsive sin. Ibn Hajar al-Haytami considered it among the gravest sins. There are religious texts that prohibit it, including: 'Allah عز وجل does not look at a man who has anal sex with a man or a woman,' and 'Accursed is he who has anal sex with a woman.' What has been attributed to Ibn 'Umar regarding its permissibility is a delusion and a mistake. He meant engaging in vaginal intercourse from the rear, not anal intercourse itself."