Sayyiduna Umar bin al-Khattab (may Allah be pleased with him) says: Some captives were brought to the Prophet (peace and blessings be upon him) (Allamah Haythami says:) I say: He then mentioned the whole hadith, in which further on are these words: "It reached me that the Prophet (peace and blessings be upon him) was travelling during one of his military expeditions. Meanwhile, one of his Companions caught a bird's chick. One of the chick's parents came and settled on the hand of the one who had caught the chick. The Prophet (peace and blessings be upon him) said: 'Are you not amazed at this bird? Its chick was caught, so it came and settled on the hand (of the one who caught its chick). By Allah, Allah Almighty is more merciful to His creation than this bird is to its chick.'"
Al-Bazzar recorded it through two routes, and the narrators of one of them are the narrators of the Sahih.
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب البعث / 18553