﴿ يَٰٓأَيُّهَا ٱلنَّاسُ ٱعْبُدُوا۟ رَبَّكُمُ ٱلَّذِى خَلَقَكُمْ وَٱلَّذِينَ مِن قَبْلِكُمْ لَعَلَّكُمْ تَتَّقُونَ ﴾

“O MANKIND! Worship your Sustainer, who has created you and those who lived before you, so that you might remain conscious of Him”

O people of Mecca worship profess the oneness of your Lord Who created you made you when you were nothing and created those that were before you; so that you may be fearful of His punishment by worshipping Him la‘alla ‘so that’ is essentially an optative but when spoken by God it denotes an affirmative