﴿ كُلُوا۟ وَٱشْرَبُوا۟ هَنِيٓـًٔۢا بِمَا كُنتُمْ تَعْمَلُونَ ﴾

“[And they will be told:] “Eat and drink with good cheer as an outcome of what you were wont to do,”

And it will said to them ‘Eat and drink in full enjoyment hanī’an is a circumstantial qualifier that is to say muhanna’īna as a reward for what bi-mā the bi- is causative you used to do’.