Giving an example of understanding a general text through the practice of the Salaf.

The Shaykh : The professor has now brought up a research paper that reminded me of an example. We have a general text: A man said the closing salam and started walking, then he remembered that he had two prostrations of forgetfulness. Does he perform them at that moment or not? ... We say regarding the general text that this is indeed ... when he remembers, he prostrates. If someone were to object to us with our previous rule, asking whether the Prophet (peace and blessings be upon him) did this, my answer is that it is not reported from the Prophet (peace and blessings be upon him), and it is not necessary for such an incident to have occurred with the Prophet (peace and blessings be upon him). Also, the criterion here does not apply, which is the rule that if it occurred, it would be transmitted, because this is an individual case. Whereas, as we know from the story of the man with the two hands and the story of 'Umar ibn al-Khattab, in which the Prophet (peace and blessings be upon him) prayed the Maghrib prayer with two rak'ahs, then the people dispersed. When he remembered that he had prayed the Maghrib with two rak'ahs, he ordered the iqamah to be called again, came and performed the forgotten rak'ah, and prostrated the two prostrations of forgetfulness. But the scenario I am presenting now is that a person, after he has walked and arrived at his house, remembers that he has prostrations of forgetfulness. Is this scenario like that situation? Can it be said here that the conditions for transmitting it are met? The answer is no. So here we say we apply the general text, meaning there is nothing before us that prevents us from applying it. And so, there are many, many branch issues. I do not know if, for the professor here, we have reached the point he was speaking about or not.