فَلْيَعْبُدُوا

فَلْيَعْبُدُوا is a verbal sentence (الجُمْلَةُ الفِعْلِيَّةُ), a conjunction followed by a jussive particle and a jussive verb

SentenceParticle / VerbVerbParticleParticle
الجُمْلَةُ الفِعْلِيَّةُحَرْفٌ جَزْمٌ وَفِعْلٌ مَجْزُوْمٌفِعْلٌ مُضَارِعٌ مَجْزُوْمٌ بِحَزْفِ النُّوْنِحَرْفٌ جَزْمٌحَرْفُ العَطْفِ 
verbal sentencea jussive verbal sentencea present or future tense jussive verba jussive, imperative particleconjunction 
   
so, let them worshipفَلْيَعْبُدُوا=يَعْبُدُوالْفَ
so let them worshipthem worshipletso
Surah/Below is the only verse in the holy Quran containing the compoundفَلْيَعْبُدُوا
Verb
106-3So, let them worship the Lord of this houseفَلْيَعْبُدُوْا رَبَّ هَذَا الْبَيْتِ

Valuable resources:

فَلْيَعْبُدُوا Corpus.Quran.com

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