Tafsir of Al-Hijr 15:75

Surely, in this are signs for those who see. meaning that the traces of the destruction of that city are easily visible to any one who ponder about it, whether they look at it with physical eyesight or mental and spiritual insight, as Mujahid said concerning the phrase,

للمتوسمين

(those who see) he said, "those who have insight and discernment.'' It was reported from Ibn Abbas and Ad-Dahhak that; it referred to those who look. Qatadah said: "those who learn lessons.''

للمتوسمين

(those who see), therefore the meaning is "those who ponder.'' The City of Sodom on the Highroad Allah tells;

وإنها لبسبيل مقيم