"And do not cause corruption upon the earth after its reformation," meaning: after the Prophet has been sent to you.
﴿وَلا تُفْسِدُوا فِي الأَرْضِ بَعْدَ إصلاحها﴾ يَعْنِي: بَعْدَمَا بعث إِلَيْكُم النَّبِي