It is narrated from Sayyiduna Abu Hurairah, may Allah be pleased with him, that the Messenger of Allah, peace and blessings be upon him, said: When any of you leads the people in prayer, he should make it brief, because among them are the weak, the sick, and the elderly. However, when a person prays alone, he may prolong it as much as he wishes. In one narration, instead of "the weak," the word "the young" is used.