Translation:

85. Verily He Who ordained the Qur'an for thee will bring thee back to the Place of Return. Say: "My Lord knows best who it is that brings true guidance and who is in manifest error."

Notes (Tafseer)

3415. That is: order in His wisdom and mercy that the Qur-an should be revealed, containing guidance for conduct in this life and the next, and further ordered that it should be read out and taught and its principles observed in practice. It is because of this teaching and preaching that the holy Prophet was persecuted, but as Allah sent the Qur-an, He will see that those who follow it will not eventually suffer, but be restored to happiness in the Place of Return, for which see next note.

3416. Place of Return: (1) a title of Makkah; (2) the occasion when we shall be restored to the Presence of our Lord. It is said that this verse was revealed at Juhfa, on the road from Makkah to Madinah, a short distance from Makkah on the Hijrat journey. The Prophet was sad at heart, and this was given as consolation to him. If this was the particular occasion, the general meaning would refer the Place of Return to the occasion of the Resurrection, when all true values will be restored, however they may be disturbed by the temporary interference of evil in this life.

3617. Allah's greatness and infinitude are such that He can create and cherish not only a whole mass, but each individual soul, and He can follow its history and doings until the final Judgment. This shows not only Allah's glory and Omniscience and Omnipotence: it also shows the value of each individual soul in His eyes, and lifts individual responsibility right up into relations with Him.