Tafsir of Ad-Dukhan 44:41

يوم ﻻ يغني مولى عن مولى شييا

The Day when a near relative cannot avail a near relative in aught, means, no relative will be able to help another relative. This is like the Ayah:

فٳذا نفخ فى الصور فﻼ أنسب بينهم يوميذ وﻻ يتساءلون

Then, when the Trumpet is blown, there will be no kinship among them that Day, nor will they ask of one another. (23:101)

وﻻ يسل حميم حميما يبصرونهم

And no friend will ask a friend (about his condition). Though they shall be made to see one another, (70:10-11) which means, he will not ask his brother about how he is, even though he can see him with his own eyes.

وﻻ هم ينصرون

and no help can they receive, means, no relative will help another, and no help will come to him from outside