How many times is the sneezer responded to?

Al-Nu'man bin Salim said: A man sneezed in the presence of Sayyiduna Abdullah bin Amr (may Allah be pleased with him), and he prayed for him by saying 'Yarhamuk Allah' (May Allah have mercy on you). Then he sneezed a second time, and he again said 'Yarhamuk Allah'. Then he sneezed a third time, and he said: "Indeed, you are suffering from a cold."

Al-Harith said: Sayyiduna Ali (may Allah be pleased with him) said: "Say 'Yarhamuk Allah' (May Allah have mercy on you) to one who sneezes when he sneezes in front of you three times. If he sneezes more, then this is an illness."

Iyas bin Salamah said that his father, Sayyiduna Salamah bin al-Akwa' (may Allah be pleased with him), said: A man sneezed in the presence of the Prophet (peace and blessings be upon him), and he (peace and blessings be upon him) said: 'Yarhamuk Allah' (May Allah have mercy on you). Then he sneezed again a second time, and he (peace and blessings be upon him) said: "This man is suffering from a cold."

Mus'ab bin Abd al-Rahman bin Dhu'ayb said: A man sneezed in the presence of Sayyiduna Ibn al-Zubayr (may Allah be pleased with him), and he prayed for him by saying 'Yarhamuk Allah' (May Allah have mercy on you). He sneezed again, and he prayed for him a second time by saying 'Yarhamuk Allah'. He sneezed yet again a third time, and he prayed for him by saying 'Yarhamuk Allah'. Then, when he sneezed the fourth time, Sayyiduna Abdullah bin al-Zubayr said to him: "Indeed, you are suffering from a cold. Clean your nose."

Imam al-Sha'bi said: Sayyiduna Amr bin al-As (may Allah be pleased with him) said: "When one of you sneezes three times, pray for him by saying 'Yarhamuk Allah' (May Allah have mercy on you); and if he sneezes more times, do not say 'Yarhamuk Allah' to him, for this is only an illness that comes out of his head."

Muhammad bin Ja'far bin al-Zubayr said: A man sneezed in the presence of the Prophet (peace and blessings be upon him), and he (peace and blessings be upon him) prayed for him by saying 'Yarhamuk Allah' (May Allah have mercy on you). Then he sneezed, and he (peace and blessings be upon him) prayed for him by saying 'Yarhamuk Allah'. He sneezed again, and he (peace and blessings be upon him) prayed for him by saying 'Yarhamuk Allah'. Then, when he sneezed the fourth time, the Prophet (peace and blessings be upon him) said to him: "You are suffering from a cold. Go and clean your nose."

Hisham said: Al-Hasan al-Basri said regarding a person who sneezes repeatedly: "Say 'Yarhamuk Allah' (May Allah have mercy on you) to him only once."

Mansur said: Mujahid said: "It is sufficient to say 'Yarhamuk Allah' (May Allah have mercy on you) to such a person once."