What is the meaning of Sa'id ibn al-Musayyab's statement: "Perhaps a worshipper has no good in him"? And what is the ruling on migrating to a Muslim country if the father refuses unless there are official conditions, given that many Muslim countries do not accept immigrants, especially the lands of the Two Holy Mosques?

The tradition was not reported from Sa'id ibn al-Musayyab. Al-Tabarani, Al-Bayhaqi, and others narrated from Umar ibn al-Khattab, elevated to the Prophet (marfu'): "The first thing to be removed from people is trustworthiness (amanah), and the last thing to remain is prayer (salat). And many a worshipper has no good in him." Al-Albani graded this hadith as weak.

It was narrated from Zayd ibn Thabit: "Indeed, the first thing to be removed from people is trustworthiness (amanah), and the last thing to remain of their religion is prayer (salat). And many a worshipper has no share (khalaq) with Allah the Almighty." Al-Albani graded this as good (hasan).

It has a supporting narration, stopped at Ibn Mas'ud (mawquf): "The first thing you will lose from your religion is trustworthiness (amanah), and the last thing you will lose from it is prayer (salat). And soon, a people will pray, but they will have no religion."

The meaning of "many a worshipper has no good in him" is that his prayer has no portion of acceptance or reward, due to his heedlessness and his heart's amusement. Just as Ibn Mas'ud said: "Whoever's prayer does not enjoin good and forbid evil, will only increase in remoteness from Allah." An example of this is the story of Dhu al-Khuwaysirah al-Tamimi.