How about widows and orphans in Quran & Hadith?

By God's Divine wisdom, Prophet Muhammad (peace be upon him), in order to console the hearts of all orphans that would come after him, as he, the best of all mankind and the most beloved to God, was an orphan.
Muhammad used to care for orphans and he used to ask his companions to protect them and to treat them well. He also showed the merits that come from that.
Al-Bukhari narrated that Prophet Muhammad, said:
"I and the custodian of an orphan are like this (together) in Paradise", and he joined his forefinger and middle finger together.
"Whoever removes a worldly grief from a believer, Allah will remove from him one of the griefs of the Day of Judgment" [Saheeh Muslim]
A man once came to the Messenger of Allah, sallallaahu`alaihiwasallam, and complained that he feels hardness in his heart. The Messenger of Allah said, what translated means, "Would you like that your heart becomes soft and that you acquire what you need? Be merciful with the orphan, pat his head and feed him from what you eat. This will soften your heart, and enable you to get what you need." [At-Tabaraanee & As-Silsilah as-Saheehah] "

"One who cares for widows and the poor is like those who fight in the way of Allah or those who spend their days fasting and their nights praying." [Agreed upon, also in Adab al-Mufrad of Imaam Al-Bukhari in chapter "The Virtue of Those Who Care for Orphans"]

Islam appreciates and values widows especially those who keep bringing up their children, the prophet (Blessings and peace of Allah be upon him) promised such women to be with him at his degree in paradise, he (Blessings and peace of Allah be upon him) said: “Me and a lively woman like these two (fingers) at the Day of Judgment, he pointed by the middle finger and the forefinger, a woman who becomes a widow after her husband while she has a good position and still pretty and keeps herself bringing up her children until they grow up or die.”
It is well known that among the reasons why Islam encourages polygamy is to urge men to marry the widows of martyrs who died defending Islam to help them bringing up their children and also brothers’ widows to help bringing up their nephews properly.
As for orphans, God honors them so much as He made just rubbing an orphan’s head softens one’s heart, and supporting an orphan deserves nothing but paradise, God urges to keep the rights of orphans and He warns people from taking their wealth, He says:
“Those who unjustly eat up the property of orphans, eat up a Fire into their own bodies: They will soon be enduring a Blazing Fire!” Surat An’nessaa’,Verse 10.

Islamic legislation as being more caring and concerning, put a perfect great law concerning all the orphans’ issues, no other international law ever matches the Islamic law for orphans until they are mature and can keep and be responsible for their own properties.