Thawāb al-Aʿmāl wa ʿiqāb al-Aʿmāl > Punishment of claiming Imamate while the true Imam is present
Hadith #4

وَ بِهَذَا الْإِسْنَادِ عَنْ مُحَمَّدِ بْنِ الْحُسَیْنِ عَنِ ابْنِ سِنَانٍ عَنْ یَحْیَی أَخِی أُدَیْمٍ عَنِ الْوَلِیدِ بْنِ صَبِیحٍ قَالَ سَمِعْتُ أَبَا عَبْدِ اللَّهِ ع یَقُولُ إِنَّ هَذَا الْأَمْرَ لَا یَدَّعِیهِ غَیْرُ صَاحِبِهِ إِلَّا بَتَرَ اللَّهُ عُمُرَهُ.

4. It is narrated that Imam Ja’far Sadiq (a.s.) said, “Allah will shorten the life of those who claim to be an Imam except for the true one.”