Sayyiduna Abu Hurayrah (may Allah be pleased with him) narrates from the Messenger of Allah (peace and blessings be upon him) that he (peace and blessings be upon him) said: "The sick should not be brought near the healthy." Then al-Harith bin Abi Dhubab al-Dawsi said to him: But you yourself used to narrate from the Messenger of Allah (peace and blessings be upon him) that disease is not contagious. Sayyiduna Abu Hurayrah (may Allah be pleased with him) denied it. Al-Harith bin Abi Dhubab said: Indeed you did! You yourself used to narrate it from the Messenger of Allah (peace and blessings be upon him). The dispute between Sayyiduna Abu Hurayrah (may Allah be pleased with him) and al-Harith grew heated, so Sayyiduna Abu Hurayrah (may Allah be pleased with him) became angry and spoke in the Abyssinian language, then said to al-Harith bin Abi Dhubab: Do you know what I said? Al-Harith said: No. Sayyiduna Abu Hurayrah (may Allah be pleased with him) said: I said: I refuse, meaning that I did not narrate it the way you say. Abu Salamah bin Abd al-Rahman (may Allah have mercy on him) said: Then Sayyiduna Abu Hurayrah (may Allah be pleased with him) held firm to what he used to narrate to us from the Messenger of Allah (peace and blessings be upon him): "The sick should not be brought to the healthy," and he abandoned the saying "Disease is not contagious" which he used to narrate from the Prophet (peace and blessings be upon him). Abu Salamah (may Allah have mercy on him) said: I do not know whether Sayyiduna Abu Hurayrah (may Allah be pleased with him) forgot that word, that is, "Disease is not contagious," or what his situation was; yet I never knew him to forget any word after he had once narrated it to us from the Messenger of Allah (peace and blessings be upon him), except his denial of the saying "Disease is not contagious."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب النكاح / 14238