As guidance and mercy for the doers of good (31:3)

Almuntakhab Fi Tafsir Alquran Alkarim

The Book symbolizing the spirit of truth guiding into ail truth and to the best way of moral rightness which has had everlasting residence in the character of the Godhead and to the uprightness of decision. And it is a guide to the heart and the conduct and to the best way of life besides being a mercy to those who perfect their illustrious toils and turn their thoughts on moral excellence and benevolence and imprint their deeds with wisdom and piety

Tafseer Tafheem-ul-Quran by Syed Abu-al-A'la Maududi

(31:3) a guidance and mercy for the doers of good, *2

As guidance and mercy for the doers of good meaning

*2) That is, "These verses give guidance to the Right Way and have been sent down as a mercy from God. But the people who can profit by this mercy and guidance are only those who adopt a righteous attitude, who wish to become good, who crave for their own well-being, whose quality is that they avoid the evil when they are warned of it, and follow the good when they are shown the ways to it. As for the wicked and mischievous people, they will neither profit by this guidance nor receive any share from this mercy. "
 

As guidance and mercy for the doers of good meaning in Urdu

ہدایت اور رحمت نیکو کار لوگوں کے لیے