Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him) narrates that the Prophet (peace and blessings be upon him) said: "It is part of faith that a man loves another person, and loves him only for the sake of Allah Almighty, not because of some wealth the other person gave him; that is faith."
Imam al-Tabarani recorded this narration in al-Mu'jam al-Awsat, and its narrators are thiqat (trustworthy). (Allamah Haythami says:) I say: Before this, in the Book of Faith, hadiths have passed concerning love for the sake of Allah Almighty and hatred for the sake of Allah Almighty.
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب الزهد / 17982
Hadith Gradingمحدثین:إسنادہ صحیح
Hadith Takhrij«أخرجه المعجم الأوسط للطبراني برقم: 7210»
It is narrated from Sayyiduna Abu Umamah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "Whenever a servant loves another servant purely for the pleasure of Allah, he is (thereby) only honouring and revering his Lord, the Mighty and Majestic."
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب الزهد / 17983
Hadith Gradingمحدثین:إسنادہ ضعیف
Hadith Takhrij«خرجه احمد فى المسند (259/5) ، أخرجه مسند أحمد برقم: 21726»