Turn back before it is taken out of your hands
A command with a deadline built into the verses around it.
وَأَنِيبُوٓا۟ إِلَىٰ رَبِّكُمْ وَأَسْلِمُوا۟ لَهُۥ مِن قَبْلِ أَن يَأْتِيَكُمُ ٱلْعَذَابُ ثُمَّ لَا تُنصَرُونَ
Wa anībū ilā rabbikum wa aslimū lahu min qabli an ya'tiyakumu-l-ʿadhābu thumma lā tunṣarūn.
“And return [in repentance] to your Lord and submit to Him before the punishment comes upon you; then you will not be helped.”
Source
The Qur'an · 39:54
Qur'an
- Qur'anic text in the Uthmani script via Quran.com; translation: Saheeh International