يَٰٓأَيُّهَا ٱلنَّاسُ ٱعْبُدُوا۟ رَبَّكُمُ ٱلَّذِى خَلَقَكُمْ وَٱلَّذِينَ مِن قَبْلِكُمْ لَعَلَّكُمْ تَتَّقُونَ
O mankind, worship your Lord, who created you and those before you, that you may become righteous -
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