Serving dream meaning is explained below using 2 different sources. Each interpretation is shown with its source.

Interpretation 1 — Ibn Seerin

To serve the poor in a dream, to humble oneself to them, to lower one’s wings to the believers, to stand before the righteous people with respect and obey their instructions in a dream means being extremely lucky in God’s sight, and that one can anticipate a good conclusion to his life in this world. It also could mean joining the company of gnostics and the circles of righteous people in this world, and God willing, one will rise in station in this world and in the hereafter.
Source: Islamic Dream Interpretation Author: Ibn Seerin

Interpretation 2 — Margaret Hamilton

Literally serving others in some capacity
Source: Dream Dictionary Unlimited Author: Margaret Hamilton