Please provide evidence where it says it is allowed in Islam to beat his wife? Wife beating is not only restricted to Islam. Ignorant men, no matter whatever their faith will beat his wife with the help of shaytaan.
Men are the protectors and maintainers of women, because
Allah has given the one more (strength) than the other, and
because they support them from their means. Therefore the
righteous women are devoutly obedient, and guard in (the
husband's) absence what Allah would have them guard. As to those
women on whose part ye fear disloyalty and ill-conduct, admonish
them (first), (next), refuse to share their beds, (and last)
beat them (lightly); but if they return to obedience, seek not
against them means (of annoyance): For Allah is Most High, Great
(above you all). 4:34
This Ayat clearly gives the man authority of home and in the event of any disloyalty man is allowed to punish her on third attempt.
My question was that what if a man is disloyal? Can a wife beat her husband? can she stop him from approaching her on bed?