Narrated Abu Huraira:The Prophet (ﷺ) or Abul-Qasim said, "If the Ansar took their way through a valley or a mountain pass, I would take Ansar's valley. And but for the migration, I would have been one of the Ansar." Abu Huraira used to say, "The Prophet (ﷺ) is not unjust (by saying so). May my parents be sacrificed for him, for the Ansar sheltered and helped him," or said a similar sentence.
حَدَّثَنِي مُحَمَّدُ بْنُ بَشَّارٍ، حَدَّثَنَا غُنْدَرٌ، حَدَّثَنَا شُعْبَةُ، عَنْ مُحَمَّدِ بْنِ زِيَادٍ، عَنْ أَبِي هُرَيْرَةَ ـ رضى الله عنه ـ عَنِ النَّبِيِّ صلى الله عليه وسلم أَوْ قَالَ أَبُو الْقَاسِمِ صلى الله عليه وسلم " لَوْ أَنَّ الأَنْصَارَ سَلَكُوا وَادِيًا أَوْ شِعْبًا، لَسَلَكْتُ فِي وَادِي الأَنْصَارِ، وَلَوْلاَ الْهِجْرَةُ لَكُنْتُ امْرَأً مِنَ الأَنْصَارِ ". فَقَالَ أَبُو هُرَيْرَةَ مَا ظَلَمَ بِأَبِي وَأُمِّي، آوَوْهُ وَنَصَرُوهُ. أَوْ كَلِمَةً أُخْرَى.
Bukhari
Merits of the Helpers in Madinah (Ansaar) • Hadith 4