'Doing' in the Bible

"Behold, I have given to the descendants of Levi every tithe in Israel as an inheritance in return for their service, which they [are] doing, the work of the tent of assembly.

The donkey said to Balaam, "Am I not your donkey on which you have ridden all your life until this day? Have I been in the habit of doing this to you?" He said, "No."