Command from Cultist Grand Inquisitor is a manuscript in Diablo III. It is found on a lecturn in one of the three levels of the Halls of Agony in the first act. Finding it will add to the Taking Notes achievement. The writing is followed up with the Reply from Cultist Grand Inquisitor manuscript.
The manuscript reads as follows:
I need more bodies! You think my summoners can just conjure up a demon whenever it pleases them? We must have blood — fresh blood, mind you — and human flesh to bolster our magic. I will be expecting a reply from you shortly.