Sayyiduna Buraydah (may Allah be pleased with him) narrates: the Prophet (peace and blessings be upon him) said: "Spending in Hajj is like spending in the path of Allah: its reward is seven hundred times over."
Imam Ahmad recorded it, and Imam al-Tabarani in al-Mu'jam al-Awsat. Its chain contains a narrator, Abu Zuhayr; I have not found anyone who mentions him.
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب الحج / 5268
Hadith Gradingمحدثین:إسناده ضعیف
Hadith Takhrij«اخرجه احمد فى المسند (354/5 و 355) ، أخرجه مسند أحمد برقم: 22491، وأخرجه المعجم الأوسط للطبراني برقم: 5270»