لَا أَعْبُدُ مَا تَعْبُدُونَ
I do not worship what you worship. (109:2)
Lā is negative, not prohibitive, so aʿbudu is an indicative imperfect verb, not a jussive command. The verse denies the speaker's act of worship and identifies its contrasting object through mā taʿbudūn.
Using an imperfect verb foregrounds worship as an action. The verse should not be reduced either to a momentary refusal or exclusively to a future promise; read with the following verses, it gives a strong proclamation of non-participation in the other's worship.