Qatadah said: Sa'd bin Ubadah (may Allah be pleased with him) got up to urinate, then came back and said: I feel something in my back. Not long passed before he died. Then the jinn lamented him and said: "We have killed the chief of al-Khazraj, Sa'd bin Ubadah; we shot him with two arrows that did not miss his heart."
Hadith Referenceالمعجم الكبير للطبراني / باب السين / 5341