Islam is following Qur'an and Sunnah as understood and practised by Sahabah.

Islaam Is.......
Following Qur'aan And Sunnah As Understood And Practiced By Sahaaba
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The one who looks after and works for a widow.

Narrated Safwan bin Salim:

The Prophet (صلى الله عليه وسلم ) said "The one who looks after and works for a widow and for a poor person, is like a warrior fighting for Allah's Cause or like a person who fasts during the day and prays all the night."

Reference  : Sahih al-Bukhari 6006