ENOfficial
It is narrated on the authority of Anas that the Apostle (may peace and blessings be upon him) said: The love of the Ansar is the sign of faith and hatred against them is the sign of dissemblance.
Source: sunnah.com
Other translations
Arabic
حَدَّثَنَا يَحْيَى بْنُ حَبِيبٍ الْحَارِثِيُّ، حَدَّثَنَا خَالِدٌ، - يَعْنِي ابْنَ الْحَارِثِ - حَدَّثَنَا شُعْبَةُ، عَنْ عَبْدِ اللَّهِ بْنِ عَبْدِ اللَّهِ، عَنْ أَنَسٍ، عَنِ النَّبِيِّ صلى الله عليه وسلم أَنَّهُ قَالَ " حُبُّ الأَنْصَارِ آيَةُ الإِيمَانِ وَبُغْضُهُمْ آيَةُ النِّفَاقِ " .
sunnah.com