لْ

A word in the Arabic language will either be 1) a verb or 2) a noun or 3) a particle – لْ is a particle

لْ is used to introduce an imperative to a jussive verb meaning let or let do

حَرْفُ جَزْمٍلLetحَرْفٌلَامُ الْأَمْرِ
used to introduce an imperative to a jussive verbRootLet doParticleImperative لْ
Surah/Below are the verses in the holy Quran consisting of the imperative لَامٌلْ
Verse
96-17Then let him call upon his councilفَلْيَدْعُ نَادِيَهُ
106-3So let them worship the Lord of this houseفَلْيَعْبُدُوْا رَبَّ هَذَا الْبَيْتِ