How do we reconcile the prohibition of the Prophet (peace and blessings be upon him) against swearing by fathers with the fact that he swore, saying, "May he succeed by his father, if he is truthful"?

The Shaykh : Some said that this contains a transcription error and that the original text was "May he succeed by Allah," but because they did not separate words or place vowel marks in the early period, "May he succeed by Allah, if he is truthful" became similar to "by his father." There is no doubt that this is an error, because hadiths are transmitted both orally and in writing, and those who transmitted it said "May he succeed by his father." Second: Some said that this was before the prohibition of swearing by fathers. This opinion requires something: what is it? The date. Some scholars said that this is something that slips off the tongue without intention, like his saying, "May your mother be bereaved of you, O Ma'adh." These are three opinions. Some scholars said that it is impossible for the Prophet (peace and blessings be upon him) to have in his heart the same reverence for the object of the oath as others do. On this basis, he would be an exception. How many is this? Four. They preferred this opinion, meaning they strengthened it, because the Prophet (peace and blessings be upon him) did not swear by his own father; he swore by the father of another, so he would not have in his heart the same reverence as the one who swears by his own father. For the one who swears by his own father swears by a person who is at the peak of greatness, honor, and pride in his eyes, unlike the one who swears by the father of another, who does not accept in his heart what is in the heart of the one who swears by his own father. It is also possible to say that this is from the ambiguous (mutashabih), and we have what is clear and decisive (muhkam). When there is ambiguity, the obligatory course is to return to the clear and decisive and say, "Allah knows best." It may be a special attribute of the Messenger, or forgetfulness, or before the prohibition, or a person may say it without intention. All of this is possible. As long as it is possible and we have something clear and decisive, the obligatory course is to return to the clear and decisive. Do you understand?

The questioner : ... .

The Shaykh : And his father, if he said "May he succeed by his father" or "May he succeed by his father," but...