Word by Word Analysis

وَأَنِ ٱسْتَغْفِرُوا۟ رَبَّكُمْ ثُمَّ تُوبُوٓا۟ إِلَيْهِ يُمَتِّعْكُم مَّتَـٰعًا حَسَنًا إِلَىٰٓ أَجَلٍ مُّسَمًّى وَيُؤْتِ كُلَّ ذِى فَضْلٍ فَضْلَهُۥ ۖ وَإِن تَوَلَّوْا۟ فَإِنِّىٓ أَخَافُ عَلَيْكُمْ عَذَابَ يَوْمٍ كَبِيرٍ 3

And [saying], "Seek forgiveness of your Lord and repent to Him, [and] He will let you enjoy a good provision for a specified term and give every doer of favor his favor [i.e., reward]. But if you turn away, then indeed, I fear for you the punishment of a great Day.