Abdullah bin Abbas (may Allah be pleased with them both) said: 'And those of you who die and leave behind wives should make a bequest for their wives: provision for a year without turning them out' [Surah al-Baqarah: 240]; this verse has been abrogated by the verses of inheritance, through what has been prescribed for them: a quarter and an eighth; and the waiting period of a year has been abrogated by her waiting period being set at four months and ten days.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب العدد / 15461