It is narrated from Hazrat Shureid (may Allah be pleased with him) that I heard the Noble Prophet (peace and blessings be upon him) saying: Whoever kills even a sparrow unjustly, it will cry out before Allah on the Day of Resurrection, saying, "O Lord! So-and-so killed me unjustly; he did not kill me for any benefit."
Hadith Referenceمسند احمد / تتمہ مُسْنَدِ الْكُوفِيِّينَ / 19470
Hadith Gradingحکم دارالسلام:إسناده ضعيف لجهالة صالح بن دينار