A man in doubt about tawaf and stoning the Jamarat: what he should do

Sayyiduna Ali (may Allah be pleased with him) said: When you are performing tawaf and fall into doubt, not knowing whether the tawaf is complete or not, then complete what you are in doubt about, for Allah Almighty will not punish for doing more tawaf.

Ata was asked: If a man falls into doubt about tawaf, not knowing whether he has performed the tawaf or not, what should he do? He said: He should perform the tawaf again.

Abu Mijlaz said: While stoning the Jamarat, I forgot how many I had thrown. I asked Sayyiduna Ibn Umar (may Allah be pleased with them both), but he gave me no answer. Then Ibn al-Hanafiyyah passed by me, so I asked him. He said: O Abdullah, nothing is greater in our view than prayer, and when one of us forgets in prayer, he repeats the prayer. (Abu Mijlaz said:) I told Sayyiduna Ibn Umar (may Allah be pleased with them both) of this answer, and he said: Indeed, they are of the Household (of the Prophet); matters have been made properly understood to them.