Sa'id bin Jubayr narrates from Sayyiduna Ibn Abbas (may Allah be pleased with them both) regarding this statement of Allah Almighty, "And let them not display their adornment except what appears of it" [Surah al-Nur: 31], that he said: What is meant by it is kohl and the ring.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 3215