18-102
Then, do those who do not believe think that they can take My servants as guardians besides Me? We have certainly prepared hell (as) an entertainment for the infidels.
Those who consider anyone other than Allah (SWT) as their guardian will be punished in hell.
18-103
Say, “”Shall We inform you of the greatest losers (in respect of their) works?
The greatest losers are those who misdirect their efforts in the life of this world but they think that they are doing good work. Such persons do not believe in and act in accordance with the message of Allah (SWT) and deny their meeting Him, therefore their work will become fruitless and they will be punished in hell.
18-107
Those who believe and do righteous works, certainly for them, gardens of paradise will be the entertainment.
The believers who do good will be in paradise.
18-109
Say, “”Had the sea been ink for (writing down) the statements of my Fosterer, the sea would get exhausted before the statements of my Fosterer got exhausted, even if We were to bring (another sea) like it to supplement.””
Knowledge of Allah (SWT) and His creation is so tremendous that it cannot be written down even if all trees become pens and seven more seas or ocean are added to the present water on the surface of the earth and converted to ink 31:27.
18-110
Say, “”I am a man like you. It is communicated to me that your God is One God, so let him who hopes to meet his Fosterer, do righteous work and (let him) not associate anyone with his Fosterer in His service (worship).”” (R12)
Muhammed (PBH) was a human being. One who hopes to meet Allah (SWT) should be sure that there is only one God i.e. Allah (SWT). Therefore no one else should be associated with Him while serving or worshipping Him, all others are His slaves, with this belief he should act in accordance with the Quran and Hadees.