It was narrated that Jabir said: "Mu' adh bin Jabal Al-Ansari led his companions in the 'Isha' prayer and he made it long. A man among us went away and prayed by himself. Mu`adh was told about that and he said: 'He is a hypocrite.' When the man heard about that, he went to the Messenger of Allah P.B.U.H and told him what Mu'adh had said to him. The Prophet P.B.U.H said: 'Do you want to be a cause of Fitnah (trial. tribulation), 0 Mu'adh? When you lead the people in prayer, recite "By the sun and its brightness," and "Glorify the Name of your Lord the Most High: and "By the night as it envelopes," and "Recite in the Name of your Lord.' (Sahih)