Translation of the verse 3 from Surah Al-Qalam : Number of verses 52 - - page 564 - Part 29.
And verily, for you (O Muhammad SAW) will be an endless reward.
And indeed, for you is a reward uninterrupted.
(68:3) and surely yours shall be a never-ending reward, *3
*3) That is, "You will get an unlimited and continuous reward, for although you have to hear discouraging and disturbing things in response to the efforts that you are making for the instruction and guidance of the people, yet you are steadfastly performing your Mission of calling them to the Right Way."
Source : Al-Qalam Verse 3: And indeed, for you is a reward uninterrupted.