مناسك حج - مكارم شيرازى، ناصر - الصفحة ١٧٦ - Rulings of Wuquf in Arafat and Mash'ar
Article ٢٧٧- Whenever a pilgrim doubts about the number of pebbles which have been hurled, he/ she should take the lesser number and perform the rest, and if he/ she is sure about performing less than seven, he/ she can perform the rest if the sequence has not been past and if it has been passed it is precaution to perform the rest and then perform it again by other seven pebbles.
Article ٢٧٨- Whenever a person renounces Ramy al- Jamarah because of forgetfulness or ignorance about the matter, it is necessary to perform that whenever he/ she remembers or informed about the matter until the thirteenth day, and it is better to perform the Ghazaa of the previous day before the noon and the duty of that day in afternoon; but it has no problem to perform them both in one time( first the Ghazaa of the previous day and then the duty of that same day ).