Sunan an Nasai
3532
Sahih+2

Furai'ah bint Malik, the sister of Abu Sa'eed Al-Khudri, said:"My husband died in Al-Qadum, so I went to the Prophet and told him that our house was remote." He gave her permission then he called her back and said: "Stay in your house for four months and ten days, until the term prescribed is fulfilled

SahihAbu Ghuddah
SahihAl-Albani