4:24

Also forbidden for you are married women, except those who have fallen in your hands as prisoners of war. This is the order of Allah relating to marriage prohibitions. All women other than these are lawful provided you seek them in marriage with gifts from your property (dowry), desiring chastity and not lust. Give them their dowry as an obligation for the benefit you have received from your marriage relationship. However, there is no blame on you if you change the agreement of dowry with mutual consent. Allah is the Knowledgeable, Wise.
Meaning:-
Chastity: “morally pure,” and preserving your chastity means you are keeping your body pure and free from sexual.
Lust: very strong sexual desire, sexual appetite