إِنَّ فِي ذَلِكَ لَذِكْرَى لِمَن كَانَ لَهُ قَلْبٌ أَوْ أَلْقَى السَّمْعَ وَهُوَ شَهِيدٌ
There is indeed an admonition in that for one who has a heart, or gives ear, being attentive.
Agha Ali Puya Commentary
Commentary on Quran 50:37
[Pooya/Ali Commentary 50:37] Only those who have the heart and understanding to apply to Allah's guidance, can give thought to what they see and testify the truth, are capable of deriving benefits from the Quran. Isa said: "He that has ears, let him hear." (Matthew 11: 15) Aqa Mahdi Puya says: Either one should have a pure heart and understanding to mirror or reproduce the truth, or listen to and follow the "divinely endowed with wisdom" guides.