Lit., "a warning of [or "from among"] the warnings of old" - implying that the revelation granted to Muhammad does not aim at establishing a "new" religion but, on the contrary, continues and confirms the basic message entrusted to the earlier prophets - in this particular instance alluding to the certainty of the coming of the Last Hour and of God's ultimate judgment.
Malik Quran Translation
This Warner (Muhammad) is just like the earlier warners.
Yusuf Ali Quran Translation
This is a Warner of the (series of) Warners of old! 5123
Yusuf Ali Translation Note Number :
The Prophet before the Quraish (and before us) continues the line of messengers of Allah who have come to teach mankind and lead men into unity and righteousness. Shall we not listen to his voice? Every day that passes, the Judgment approaches nearer and nearer. But Allah alone can say at what precise hour it will come to any of us. It is certain, and yet it is a mystery, which Allah alone can lay bare.