نُجُومُ سَمَاءٍ
Stars of the sky.
After reference to an esteemed group, the understood statement may be hum nujūmu samāʾ (“they are stars of the sky”). Leaving out the subject foregrounds the lofty image instead of repeating the group’s name.
Conversely, a speaker may suppress the name of a disreputable group to avoid even voicing it. One case preserves the dignity of the honoured referent; the other keeps the speaker’s tongue from mentioning the despised one.
In both situations, analysis depends on the known referent and the speaker’s attitude of admiration or distaste.