Surah 26. Ash-Shuara, Ayah 225

The idiomatic phrase hama fi widyan (lit., "he wandered [or "roamed"] through valleys") is used, as most of the commentators point out, to describe a confused or aimless - and often self-contradictory - play with words and thoughts. In this context it is meant to stress the difference between the precision of the Qur'an, which is free from all inner contradictions (cf. note [97] on 4:82 ), and the vagueness often inherent in poetry.

 lit., roam aimlessly in every valley.