Sayyiduna Abu Umamah bin Sahl bin Hunayf (may Allah be pleased with him) says that Sayyiduna Amir bin Rabi'ah (may Allah be pleased with him) passed by Sayyiduna Sahl bin Hunayf (may Allah be pleased with him) while he was bathing, and said: I have never, until today, seen even the skin of a secluded maiden like this. At this, Sayyiduna Sahl bin Hunayf (may Allah be pleased with him) fell to the ground. He was carried to the Prophet (peace and blessings be upon him), and it was said: Sahl has suddenly been struck down. He (peace and blessings be upon him) asked: "Whom do you suspect (of this)?" The Companions (may Allah be pleased with them) said: Amir bin Rabi'ah passed by. He (peace and blessings be upon him) said: "Would you kill your brother? When one of you sees something good, why does he not pray for blessing for it?" Then he (peace and blessings be upon him) ordered Sayyiduna Amir bin Rabi'ah (may Allah be pleased with him) to perform ablution: to wash his face and both hands up to the elbows, his legs up to the knees, and the inside of his lower garment, and then the water was to be poured over Sayyiduna Sahl bin Hunayf (may Allah be pleased with him).
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الضحايا / 19616