Hadith.4512 - Imam Jafar ibn Muhammad Al-Sadiq (as) was asked about the saying of Allah (swt), the Mighty and Majestic: "And [forbidden to you are] married women" (Surah An-Nisa 4:24).
Imam (as) said: "They are those who have husbands."
I said: "And [lawful in marriage are] chaste women from among those who were given the Scripture before you" (Surah Al-Ma'idah, 5:5).
Imam (as) said: "They are the chaste women."