Is it permissible for a man to have anal intercourse with his wife, and is the prohibition specific to ejaculation therein, and what is the ruling on the wife refusing this request?

Intercourse with one's wife in her anus is forbidden by the consensus of reputable scholars. It is prohibited in the Book of Allah and the Sunnah of His Messenger, and this is the stance of the general body of Muslim imams. It has been reported that anal intercourse is "the lesser sodomy," and that Allah is not shy of the truth, so do not approach women in their anuses. It is not permissible for the wife to obey her husband if he asks her for anal intercourse, as there is no obedience to a creature in disobedience to the Creator.