Is it permissible to anally penetrate one's wife—with coitus interruptus and no ejaculation therein—at infrequent intervals, especially given that some scholars permitted it while others prohibited or disliked it, and is there any way to practice it?

Anal intercourse with women is forbidden by the four Imams, and this is affirmed by Prophetic evidence, such as his (peace be upon him) saying: "Accursed is he who has anal intercourse with a woman," and "Allah will not look at a man who has anal intercourse with his wife." The wife must not obey her husband in this matter, and if he insists, she should take her case to the ruler to separate them, because obedience is only in what is good, and this is a grave evil. Some scholars have mentioned that the husband must be disciplined, and separation should occur between them if he insists.