Surah An-Nazi'at 79:22
ثُمَّ أَدْبَرَ يَسْعَىٰ
Then he turned his back, striving [i.e., plotting].
Translation: Saheeh International
Tafsir
Then he turned his back to faith going about in haste throughout the land causing corruption.
Excerpt from Tafsir al-Jalalayn, commentary on 79:22, via Quran.com. The reader has the full commentary and 9 more tafsirs.