﴿ وَمَآ أَرْسَلْنَٰكَ إِلَّا رَحْمَةًۭ لِّلْعَٰلَمِينَ ﴾

“And [thus, O Prophet,] We have sent thee as [an evidence of Our] grace towards all the worlds.”

(We sent thee) O Muhammad (not save as a mercy) that shields from chastisement (for the peoples) from among the jinn, humans and all those who believe in you; it is also said that mercy here means blessing.