Narrated Mujahid:(regarding the Verse): 'If any of you dies and leaves wives behind,' That was the period of the 'Iddah which the widow was obliged to spend in the house of the late husband. Then Allah revealed: And those of you who die and leave wives should bequeath for their wives a year's maintenance and residence without turning them out, but if they leave, there is no blame on you for what they do of themselves, provided it is honorable (i.e. lawful marriage) (2.240) Mujahid said: Allah has ordered that a widow has the right to stay for seven months and twenty days with her husband's relatives through her husband's will and testament so that she will complete the period of one year…
Verses2:240