The Coalition - 33:39 Those who announce the messenger of Allah honor Him alone and fear none but Allah. Allah is sufficient as a reckoner.
In the context of verses 38, 39: Those who proclaim the messenger of Allah are not afraid of anyone:
The Family Of Imran/3:146 How many prophets fought with them, many who were devoted to their Lord. They did not slacken in the way of Allah because of what befell them, nor did they give in. Allah loves those who persevere.

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.

Prophet Abraham/14:10 "Their messengers said: "Do you doubt Allah, Who created the heavens and the earth, and He calls you to forgive you your sins and gives you a certain period of time?"They said: "You are but men like us, and you want to turn us away from that which our forefathers used to serve. Bring us a clear authorization"."
Prophet Abraham/14:11 "And their messengers said to them: "Surely we are human beings like you. But Allah chooses whom He wills from among His servants and bestows favor upon him. It is impossible for us to bring you a certificate of authority without Allah´s permission. Believers should trust in Allah."
Prophet Abraham/14:12 Why should we not trust in Allah, when He has shown us the way? We will patiently endure the persecution you are inflicting on us. Those who trust must trust in Allah.
Prophet Abraham/14:13 "The disbelievers said to their messengers, "Either you return to our religion or we will expel you from our land!"Their Lord revealed to them, "We will destroy the wrongdoers."

The Forgiver/40:26 "Pharaoh said, "Let me kill Moses so that he may call upon his Lord. I fear that he may change your religion or cause evil in the land."
The Forgiver/40:27 "Moses said, "I have sought refuge with my Lord and your Lord from every fierce man who does not believe in the Day of Reckoning."