Tafsir of Maryam 19:92

But it is not suitable for the Most Gracious that He should beget a son. Meaning that it is not befitting of Him, nor is it appropriate for His lofty majesty and greatness. There is no coequal for Him in His creation, because all creatures are His slaves. This is why He says,

إن كل من في السماوات واﻻرض إﻻ آتي الرحمن عبدا