Is it undutifulness to parents for a person to travel to seek a livelihood without his parents' permission?

The questioner : ...to enable me to reach him or be present; knowing that I had sent him the orphan's expenses and the like.

The Shaykh : If your Lord knows that you exerted yourself to bring him before his death, but the circumstances there did not help you, then his anger has no effect.

The questioner : But.

The Shaykh : But if you were negligent with him, whether in your delay in going to him or in traveling in the first place against his will.

The questioner : Of course, during the morning of the day I was traveling, he cried, and he held onto the travel ticket and the passport, and he was preventing me from traveling.

The Shaykh : That is it.

The questioner : And he said: "My son, you are going to leave and I will not see you again. I am certain that I will die and not see you." So when he was sick, they sent for me, and I tried to take leave from my workplace, but they prevented me; they said to me: "There are no leaves, leaves are forbidden." So I sent him money, and twenty days after the money arrived, he passed away.

The Shaykh : So the original act of your leaving was wrong, and it is not your inability to return to him that is the error; the original act of your leaving was wrong. It is not permissible for a righteous, dutiful son to leave to seek knowledge, to seek knowledge, or to leave for jihad in the path of Allah except with the permission of his parents, as came in the authentic hadith that a man from Yemen came to the Prophet (peace and blessings be upon him) and said: "I have come to fight with you, and I have left my two parents weeping." He said: . So it is not permissible for a son to leave except with the father's consent, except in one case: if the leaving is to perform an individual obligation upon him, then here .
I give you an example: It is obligatory for every adult Muslim to pray the Friday prayer in the mosque with the Muslim congregation; this is without dispute. And it is obligatory for him to pray the five daily prayers in the mosque according to the stronger opinion of the Muslim scholars, as the authentic hadiths indicate, including the hadith: which I mentioned earlier. So if the father says to his son: "Do not pray in the mosque, pray at home," he is not to be obeyed or listened to, even if he is angry, even if he is foolish, even if he kills himself; because . But if he says to him: "Go pray the obligatory prayer and come back, do not pray the recommended practice," then he must be obeyed; because leaving the recommended practice is not a sin. Yes, he misses much good and great reward, but leaving the recommended practice is not a sin; so he is obeyed here and not obeyed there. So you left in the path of seeking a livelihood.

The questioner : Yes.

The Shaykh : And you left without his permission, so this is where your error came from. And therefore—and I am remembering your question—actually, now there is no way for you to make up for what you missed in the matter except by increasing your supplication for him and doing righteous deeds, such as charity, fasting, Hajj, or 'Umrah, and intending that the reward be recorded for your father; this may mitigate the consequence of that sin that came from you at the beginning of your leaving.
This is the answer to your question.