Sahl b. Sa'd reported God’s messenger as saying, "In paradise there are eight gates among which is a gate called ar-Rayyan which only those who fast will enter."
Abu Huraira reported God’s messenger as saying, "When Ramadan begins the gates of heaven are opened." A version has, "The gates of paradise are opened, the gates of jahannam are locked, and the devils are chained." Another has, "The gates of mercy are opened."
Abu Huraira reported God's messenger as saying, "He who fasts during Ramadan with faith and seeking his reward from God will have his past sins forgiven; he who prays during the night in Ramadan with faith and seeking his reward from God will have his past sins forgiven; and he who passes Lailat al-qadr in prayer with faith and seeking his reward from God will have his past sins forgiven."
He reported God’s messenger as saying, "Every and when the day of the fast of any of you comes he must not use vile language or raise his voice, and if anyone reviles him or tries to fight with him he should tell him he is fasting.”
*This is not from the Qur’an, but is a hadith qudsi, a tradition which gives words spoken by God.