Sayyiduna Anas bin Malik (may Allah be pleased with him) narrates: Sayyiduna Mu'adh bin Jabal (may Allah be pleased with him) used to lead his people in prayer. One day, Haram (bin Milhan) (may Allah be pleased with him) entered (the mosque), while he also intended to water his date palms. He entered the mosque to pray with the people, but when he saw that Sayyiduna Mu'adh (may Allah be pleased with him) was prolonging the prayer, he performed a brief prayer and went to water his date palms. When Sayyiduna Mu'adh (may Allah be pleased with him) completed the prayer, he was informed that Haram (may Allah be pleased with him) had entered the mosque, but when he saw your lengthy prayer, he prayed briefly and went to water his date palms. Sayyiduna Mu'adh (may Allah be pleased with him) said: Surely, he is a hypocrite! Does he hasten from the prayer for the sake of watering his date palms! Sayyiduna Haram (may Allah be pleased with him) came to the Noble Prophet (peace and blessings be upon him) while Sayyiduna Mu'adh (may Allah be pleased with him) was also sitting there. He said: O Messenger of Allah! My intention was to water my date palms, but I first came to the mosque so that I could pray with the people. But when I saw that he was leading a long prayer, I prayed briefly and went to water my date palms, so Sayyiduna Mu'adh (may Allah be pleased with him) said that I am a hypocrite. Upon hearing this, the Noble Prophet (peace and blessings be upon him) turned to Sayyiduna Mu'adh (may Allah be pleased with him) and said: Are you a cause of tribulation! Are you a cause of tribulation! Do not lead them in long prayers, and recite Surah Al-A'la, Surah Ash-Shams, and similar surahs.