. "... And for those who are pregnant (whether they are divorced or their husbands are dead), their 'Idda (prescribed period) is until they lay down their burdens, and whoever keeps his duty to Allah and fears Him, He will make his matter easy for him." (V.65:4)

Sahih al-Bukhari · Book 65 · Hadith 4909

حَدَّثَنَا سَعْدُ بْنُ حَفْصٍ، حَدَّثَنَا شَيْبَانُ، عَنْ يَحْيَى، قَالَ أَخْبَرَنِي أَبُو سَلَمَةَ، قَالَ جَاءَ رَجُلٌ إِلَى ابْنِ عَبَّاسٍ وَأَبُو هُرَيْرَةَ جَالِسٌ عِنْدَهُ فَقَالَ أَفْتِنِي فِي امْرَأَةٍ وَلَدَتْ بَعْدَ زَوْجِهَا بِأَرْبَعِينَ لَيْلَةً‏.‏ فَقَالَ ابْنُ عَبَّاسٍ آخِرُ الأَجَلَيْنِ‏.‏ قُلْتُ أَنَا ‏{‏وَأُولاَتُ الأَحْمَالِ أَجَلُهُنَّ أَن…

Narrated Abu Salama: A man came to Ibn `Abbas while Abu Huraira was sitting with him and said, "Give me your verdict regarding a lady who delivered a baby forty days after the death of her husband." Ibn `Abbas said, "Th…