Sayyiduna Buraydah (may Allah be pleased with him) states: The Prophet (peace and blessings be upon him) said to me: "Recite the Qur'an with grief, for it was revealed with grief."
Imam al-Tabarani recorded it in al-Mu'jam al-Awsat; its chain contains a narrator, Isma'il bin Sayf, who is da'if (weak).
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب التفسير / 11694