Hadith 31-293

وَبِإِسْنادِهِ عَنْ عَلِيِ‏ عَلَيْهِ السَّلامُ قالَ: مَن كَذَّبَ بِشَفاعَةِ رَسُولَ اللَّهِ لَمْ تَنَلهُ.

According to the same documentation on the authority of Ali (a.s.), “Whoever denies the intercession of God’s Prophet (S) will not benefit from it.”