Tafsir of Az-Zukhruf 43:36

The Shaytan is the Companion of the One Who turns away from Ar-Rahman Allah says,

ومن يعش

And whosoever Ya`shu (turns away blindly), means, whoever willfully ignores and turns away Al-`Asha (the root of Ya`sh) refers to weakness of vision; what is meant here is weakness of insight.

عن ذكر الرحمن

from the remembrance of the Most Gracious,

نقيض له شيطانا فهو له قرين

We appoint for him Shaytan to be a Qarin (a companion) to him. This is like the Ayat:

ومن يشاقق الرسول من بعد ما تبين له الهدى

And whoever contradicts and opposes the Messenger after the right path has been shown clearly to him, (4:115),

فلما زاغوا أزاغ الله قلوبهم

So when they turned away, Allah turned their hearts away, (61:5)

وقيضنا لهم قرناء فزينوا لهم ما بين أيديهم وما خلفهم

And We have assigned for them intimate companions, who have made fair seeming to them, what was before them and what was behind them, (41:25) Allah says here:

وإنهم ليصدونهم عن السبيل ويحسبون أنهم مهتدون