Explanation

According to this Hadīth, the Qur’an initially stated that ten times of confirmed breastfeeding make the breastfed person Mahram (unmarriageable) to those who shared breastfeeding from the same woman and their Mahram relatives. Yet, both the ruling and wording of this verse were abrogated and replaced with another verse stipulating five times of confirmed breastfeeding. Later, only the wording of the latter verse was abrogated while its ruling remained in force. As for ‘Ā'ishah's statement that the Prophet died while this verse was still being recited as part of the Qur'an, it means that the abrogation came so late that news of it did not reach some people and, thus, they continued reciting the abrogated verse as part of the Qur’an due to their ignorance of its abrogation.