البقرة — Al-Baqarah Ayat 234
وَالَّذِيْنَ يُتَوَفَّوْنَ مِنْكُمْ وَيَذَرُوْنَ اَزْوَاجًا يَّتَرَبَّصْنَ بِاَنْفُسِهِنَّ اَرْبَعَةَ اَشْهُرٍ وَّعَشْرًا ۚ فَاِذَا بَلَغْنَ اَجَلَهُنَّ فَلَا جُنَاحَ عَلَيْكُمْ فِيْمَا فَعَلْنَ فِيْٓ اَنْفُسِهِنَّ بِالْمَعْرُوْفِۗ وَاللّٰهُ بِمَا تَعْمَلُوْنَ خَبِيْرٌ
Wal-lażīna yutawaffauna minkum wa yażarūna azwājay yatarabbaṣna bi'anfusihinna arba‘ata asyhuriw wa ‘asyrā(n), fa'iżā balagna ajalahunna falā junāḥa ‘alaikum fīmā fa‘alna fī anfusihinna bil-ma‘rūf(i),wallāhu bimā ta‘malūna khabīr(un).
"And those who are taken in death among you and leave wives behind - they, [the wives, shall] wait four months and ten [days]. And when they have fulfilled their term, then there is no blame upon you for what they do with themselves in an acceptable manner. And Allah is [fully] Acquainted with what you do."