What is the ruling on combining two prayers for a worker residing in a foreign country for study and work, given the difficulty of performing prayers at their original times and straitened circumstances? And do the rulings for a traveler apply to him?

One must perform each prayer at its appointed time unless there is harm, in which case there is no sin in combining the two prayers. Anticipating problems is not an excuse for combining prayers; rather, combination is permissible only if harm actually occurs. A Muslim must prioritize their religion. Scholars have stipulated the obligation of emigration (Hijra) if a Muslim is unable to practice their rituals.