The following translation appears in Yusuf Ali's Quran translation.
013.040 Whether We shall show thee (within thy life-time) part of what we promised them or take to ourselves thy soul (before it is all accomplished),- thy duty is to make (the Message) reach them: it is our part to call them to account. وَإِنْ مَا نُرِيَنَّكَ بَعْضَ الَّذِي نَعِدُهُمْ أَوْ نَتَوَفَّيَنَّكَ فَإِنَّمَا عَلَيْكَ الْبَلاَغُ وَعَلَيْنَا الْحِسَابُ
This cannot mean in-completion of the wahi (revelation), since Muhammed (pbuh) is the seal of the prophets and one of the last ayas mention that the religion has been perfected onto you and the message is complete.
If not revelation, what is this aya referring to?