وَهُوَ كَالْأَمْرِ فِي الِاسْتِعْلَاءِ
Prohibition resembles command in the commanding stance.
Commands and prohibitions are both requestive utterances and, in their basic form, share a superior directive stance. They differ in the direction of requested conduct: command solicits doing; prohibition solicits refraining.
Uktub (“write”) and lā taktub (“do not write”) are both prospective directives. The distinction is not that one is “speech” and the other is “non-speech,” but whether performance or restraint is sought.
FeatureCommandProhibition
Requested outcomePerform an actRefrain from an act
FormIfʿalLā tafʿal
Shared featureRequest and directive stanceRequest and directive stance