The Cattle - 6:133 Your Lord is Rich, the Owner of Mercy. If He wills, He will take you away and replace you with whom He wills after you, just as He brought you from the descendants of others.
The intention is that if you disbelieve, Allah is not in need of anyone, and He is powerful and rich enough to replace you with a people who will not disbelieve:
The Ways of Ascent/70:40 By the Lord of the east and the west, Our power is sufficient...
The Ways of Ascent/70:41 To replace them with those better than themselves... No one can defeat us

Muhammad/47:38 You are called to spend in the Way of Allah, but some of you are stingy. Whoever is stingy is stingy towards himself. Allah is rich and you are poor. If you turn away, He will replace you with another people, but they will not be like you.

The Table Spread/5:54 Believers, whoever turns away from his religion, know this: Allah brings a people whom He loves, and they love Him. They are humble towards the believers and strong and firm against the disbelievers. They strive hard in the way of Allah and do not fear the condemnation of those who condemn. This is the bounty of Allah; He gives it to whom He wills. Allah is Generous, Knowing.

Originator/35:15 O mankind, you are dependent on Allah, but Allah is not dependent on anyone, the Praised.
Originator/35:16 If He wills, He will take you away and bring in your place new creatures.

Muhammad/47:38 You are called to spend in the Way of Allah, but some of you are stingy. Whoever is stingy is stingy towards himself. Allah is rich and you are poor. If you turn away, He will replace you with another people, but they will not be like you.

The Cattle/6:89 Those are they to whom We gave the Book and wisdom and prophethood. If that people disbelieve in them, We will replace them with a people who will not disbelieve in them.

The Manifestation of Losses/64:5 Has not the news reached you of those who disbelieved before and tasted the recompense of what they used to do? For them is a painful torment.
The Manifestation of Losses/64:6 "Because their messengers went to them with clear proofs and they said, "Shall a man show us the right way?"So they disbelieved and turned away. Allah is not in need of anything. Allah is the Rich, the Praised."