After Allah affirms in this noble Surah that `Isa was a worshipper and servant of Allah and He mentioned his birth from Maryam without a father, He then begins refuting those who claim that He has a son. Holy is He and far Exalted is He above such description. Allah says,
(And they say: "The Most Gracious has begotten a son." Indeed you have brought forth) This means, "In this statement of yours."
شَيْئاً إِدّاً
(a thing Idda.) Ibn `Abbas, Mujahid, Qatadah and Malik all said, "Terrible." It has been said that it is pronounced Iddan, Addan, and Addan with elongation on the first vowel. All three of these pronunciations are known, but the most popular is the first. Allah said;
"And the mountains to fall down crumbling" - 19:90.
These verses suggest that the earth, the mountains and everything that grows thereon possess a certain degree of knowledge and intelligence though in their case these perceptions are not of the same extent as that bestowed on human beings. This explains the fact that everything in the world glorifies Allah Ta’ ala as will be evident from the verse.
وَإِن مِّن شَيْءٍ إِلَّا يُسَبِّحُ بِحَمْدِهِ
"Arid there is not a single thing that does not extol His purity and praise." - 17:44.
These verses refer to this very perception of these things that to associate anything or being with Allah Ta` ala, specially to assert that He has children is a sin which makes the earth and the mountains quake with fear. Sayyidna ` Abdullah Ibn ` Abbas ؓ has said that except humans every created thing is terrified of any suggestion of association with Allah (Ruh, -ul-Ma` ani).
Tazkirul Quran
Maulana Wahiduddin KhanOn ayahs 92–95
Belief in the existence of God’s children can be explained in either of two ways: that He is in need of assistants, or like ordinary people, He is desirous of having children. Both of these propositions are baseless. The construction of the earth and the heavens is so perfect that it is unimaginable that their Maker and Mover could be prone to such weaknesses as man evinces. The grand, majestic image of the Creator, projected by His creations themselves, is not at all compatible with the concept of God being in need of children.
Uthmani text of the Madinah mushaf (King Fahd Complex). Translation: Saheeh International. Tafsir via Quran.com.