Inna lillahi wa inna ilahi rajeoon

I feel sorry, may Allah bless him with His mercy .. ameen.
Surely there is a lot about death in Quran.
My mom says when ppl talk good about a person when he dies, then the soul seemed to be a blessed one. As Allah look at His creature if they were happy with the person who died. So thats why one should always do good, inshAllah at the end you will be rewarded for that if not in world.