عَنْ عَبْدِ اللَّهِ بْنِ عَمْرٍو عَنْ أُبَيِّ بْنِ كَعْبٍ قَالَ: قُلْتُ لِلنَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ: {وَأُولَاتُ الْأَحْمَالِ أَجَلُهُنَّ أَنْ يَضَعْنَ حَمْلَهُنَّ} لِلْمُطَلَّقَةِ ثَلَاثًا أَوْ لِلْمُتَوَفَّى عَنْهَا؟ قَالَ: ((هِيَ لِلْمُطَلَّقَةِ ثَلَاثًا وَلِلْمُتَوَفَّى عَنْهَا))
It is narrated from Sayyiduna Ubayy ibn Ka'b (may Allah be pleased with him), he says: I asked the Noble Prophet (peace and blessings be upon him): The waiting period (iddah) mentioned in the verse of the Qur'an {وَاُلاتُ الْاَحْمَالِ اَجَلُہُنَّ اَنْ یَضَعْنَ حَمْلَہُنَّ} is it for those women who have been given three divorces, or is it the waiting period for a widow? The Prophet (peace and blessings be upon him) replied: For both.