﴿ يَعِظُكُمُ ٱللَّهُ أَن تَعُودُوا۟ لِمِثْلِهِۦٓ أَبَدًا إِن كُنتُم مُّؤْمِنِينَ ﴾

“God admonishes you [hereby] lest you ever revert to the like of this [sin], if you are [truly] believers;”

(Allah admonisheth you) Allah warns and prohibits you (that ye repeat not the like thereof ever) to ever engage in similar things, (if ye are (in truth) believers) if you are true believers.