Abu Hazimsaid:
"Sahl bin Sa'd As-Sa'idi used to give preference totheyoung to lead his people in prayer. It was said to him: "Do you dothat, when you have such seniority (in Islam)?" He said: "I heardtheMessenger of Allah (ﷺ) say: 'The Imam is responsible. If hedoeswell, then he will have the reward and so will they, but if hedoesbadly, then that will be counted against him but not againstthem.'"
English reference: Vol. 1, Book 5, Hadith 981
Arabic reference: Book 5, Hadith 1034