Overall meaning : Greed for more and more wealth and children keep diverting you, mankind, from obeying Allah until the time comes when you must die and be buried in your graves. Desist, then, from being so diverted from obeying Allah by multiplying your riches and offspring, for you will know the dire consequences of doing so after your death. Again, you will know the dire consequences of doing so after your death. By no means! If you knew with certainty that Allah will bring you back to life on Resurrection Day to repay you for your deeds, you would not act thus and the desire of multiplying wealth and children would not divert you from obeying Him.
I swear that you will certainly see the Blazing Fire in the hereafter. Again, I swear that you will see the Blazing Fire in the hereafter with absolute certainty. I further swear that you will be questioned on Resurrection Day about the worldly pleasures you enjoyed.