Hadith 31-231

وَبِإِسْنادِهِ قالَ: قالَ رَسُولَ اللَّهِ‏ صَلَّى اللهُ عَلَيْهِ وَآلِهِ وَهُوَآخِذٌ بِيَدِ عَلِيِ‏ عَلَيْهِ السَّلامُ: مَن زَعَمَ أَنَّهُ يُحِبُّني وَلا يُحِبُّ هذا فَقَدْ كَذَبَ.

According to the same documentation, God’s Prophet (S) was holding Ali’s (a.s.) hand and said, “Whoever claims that he loves me but does not love Ali (a.s.) is a liar.”