Is it okay to pronounce ض like ظ? Like in this Ayah, وَلَا الضَّآلِّينَ?

Assalamualikum.
Why some people pronounce ض like ظ, is it okay to pronounce ض like ظ? Like in this Ayah, وَلَا الضَّآلِّينَ I recite it like this, Wa Lad Daalleen But some people pronounce it like, Wa Laz Zaalleen.

The Answer

Wa alikom asslam,
Alhamdulilah

That is a very good question, and as a matter of fact I am preparing a lesson to warn against this mistake.
This mistake you referred to is one of the most common and is actually very wrong and haram to read the Quran the like. They even changed the name of the month Ramadan to Ramazan in some countries, which is absolutely wrong, of course.
The reason mainly because some Arabs (in the gulf area) make this mistake, but even Arabs who speak like that in their daily life, never read the Quran like that.

Allah knows best.
Asslamo alikom