And so it was - Therein indeed, We have left a Clear Sign for people who use their intellect. (The Dead Sea to this day is known as 'Bahr Lut' = The Sea of Lot and it remains devoid of plant and fish life)
And indeed We have left thereof an evident Ayah (a lesson and a warning and a sign the place where the Dead Sea is now in Palestine) for a folk who understand
And indeed, We have left a clear exemplary sign (from that region) for those who use their intellect.
Sayyed Abbas Sadr-Ameli
And certainly We have left a clear sign of it for a people who have sense
Al-muntakhab fi tafsir al-Qur'an al-Karim
And We made of its relics an evident sign emblematic of Allah's Omnipotence and Authority appreciated by people who comprehend events with their senses especially with their minds' eyes