If one commits a sin, then repents, feels remorse, and resolves not to return to it, but then returns to the sin, is his repentance accepted, and does he owe an expiation?

Question:
May Allah reward you with good, Honorable Shaykh. If a person commits a forbidden act and feels remorse for doing it, and says to himself, "I am repentant," and then commits a forbidden act again, or several times, and says, "I am repentant and I will not return to such an act," is his repentance accepted or not? And does he owe an expiation for that? We ask for guidance. May Allah reward you with good.

Answer:
Repentance is obligatory for sins. Repentance means returning to Allah (Mighty and Majestic) and to His obedience, and leaving sins and transgressions. It has three conditions. The first condition is that one leaves the sin from which he repented. The second condition is that he resolves not to return to it again. The third condition is that he feels remorse for the transgression that occurred from him. If these conditions are met, his repentance is valid and accepted by the permission of Allah. But if his soul, which commands evil, and Shaytan overcome him, and he falls into the sin again, or into other sins, he must repent to Allah (Mighty and Majestic). Every time he sins, he repents with these conditions. Repentance with these conditions, and it is not repentance with the tongue only, but rather these conditions are present in it. Every time a sin occurs from him, he repeats the correct repentance. And Allah accepts the repentance of those who repent. But he must control himself, and protect himself from falling into transgressions and desires, and resolve to obey Allah (Glorified and Exalted is He) and leave His disobedience, and Allah (Mighty and Majestic) will help him. And if he mixes with bad company or bad companions, he must stay away from them, because perhaps the cause of his repeating transgressions is his companionship with sinners. So he must stay away from them. Yes.