Quran 31:34 – Surah Luqman: God's Authority Or God's Knowledge Over Rain?
Omission is a characteristic of the Quran. It is a literary style to let the reader figure out the omissions. For example, if you do not take it as “out of His knowledge,” you have to make it “out of his authority”. Authority is not mentioned there, either. But the verse at the end says Aleem Khabeer. And thus is the perspective of knowledge. However, authority is an essential to knowledge.