سورة An-Nisa ( The Women ) - الآية 34

Men are protectors of women, because God has made some of them excel others and because they spend their wealth on them. So virtuous women are obedient and guard in the husband's absence what God would have them guard. As for those from whom you apprehend infidelity, admonish them, then refuse to share their beds, and finally hit them [lightly]. Then if they obey you, take no further action against them. For God is High, Great.