English
Ibrahim (may Allah be pleased with him) said regarding someone who forgets the obligatory prayer and does not know whether he prayed three or four Rak'ahs: "If it is his first time forgetting, he should repeat the prayer. If he frequently forgets, he should determine the most correct number. If he thinks he completed the prayer, he should perform two prostrations of forgetfulness. If he thinks he prayed three, he should add one more and then perform two prostrations of forgetfulness."