And those before them had plotted, but to Allāh belongs the plan entirely. He knows what every soul earns, and the disbelievers will know for whom is the final home.
The previous communities had plotted and devised schemes against their prophets and they rejected what they brought to them. What did they manage to do by such schemes? Nothing! This is because the effective plan is only that of Allah and no other. He, may He be glorified, is the One Who knows what their souls earn and He will recompense them for it. Then they will know how wrong they were in not having faith in Allah, and how right the believers were as they would have acquired Paradise and the best outcome.