Sayyiduna Uqbah bin Amir (may Allah be pleased with him) said that the Messenger of Allah (peace and blessings be upon him) said: "The conditions most deserving of being fulfilled are those by which you made the private parts of women lawful" (or he said: "those by which the private parts are made lawful").
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 14826