Tafsir of Al-Mulk 67:26

قل إنما العلم عند الله

Say: "The knowledge is with Allah only...'' meaning, `no one knows the time of the Day of Judgement exactly except Allah, but He has commanded me to inform you that it is real and it will definitely occur, so beware of it.'

وإنما أنا نذير مبين

and I am only a plain Warner. meaning, `I am only obligated to convey, and verily I have performed my duty (of conveying) towards you.' Then Allah says,