It is narrated from Sayyiduna Sa'id al-Ansari (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "Indeed, Allah, the Blessed and Exalted, will show special mercy to His believing servant on the Day of Resurrection because of the mercy and compassion he showed to a sparrow."
Al-Bayhaqi narrated it in Shu'ab al-Iman; however, its chain contains the narrator Abd al-Ghafur bin Abd al-Aziz, who is severely da'if (weak) and matruk (abandoned), because of which this report is technically weak.
Hadith Referenceالمطالب العالية بزوائد المسانيد الثمانية / كتاب الأدب / 2829
Hadith Gradingمحدثین:إسناده ضعيف
Hadith Takhrij«حکم الحدیث المطالب العالیہ محققاً تنسیق د. سعد بن ناصر بن عبد العزيز الشَّثري- مکتبہ شاملہ :إسناده ضعيف. » «انفرد به المصنف من هذا الطريق»