Musnad Ahmad Hadith 5096

Anas bin Sirin, may Allah have mercy on him, says that I once asked Ibn Umar, may Allah be pleased with them both, "Should I recite (Qur'an) behind the imam?" He replied, "The recitation of the imam is sufficient for you." I asked, "Can I recite a long (portion) in the Sunnah prayers of Fajr?" He replied, "The Prophet (ﷺ) used to pray the night prayer in sets of two rak'ahs." I said, "I am asking you about the Sunnah prayers of Fajr." He replied, "You are a man of thick understanding; do you not see that I am just beginning to speak? The Prophet (ﷺ) used to pray the night prayer in sets of two rak'ahs, and when he feared the approach of true dawn, he would add one rak'ah to make it Witr, then he would lay his head down and rest. Now, if you wish, you may say that the Prophet (ﷺ) slept, or if you wish, you may say that he did not sleep. Then he would get up and pray the Sunnah of Fajr at the time when the call to prayer was being heard in his ears. So how much and what kind of length would there be in that?" Then I asked, "A man has made a bequest that his wealth be spent in the way of Allah; can his wealth be spent on Hajj?" He replied, "If you do so, that too will be in the way of Allah." I further asked, "If a person misses one rak'ah with the imam, and the imam says salam, can he make up the missed rak'ah before the imam stands up?" He replied, "When the imam says salam, the follower should immediately stand up." Then I asked, "If a person, in exchange for a loan, takes more than what he gave, what is the ruling?" He replied, "On the Day of Resurrection, every deceiver will have a flag placed at his hips in proportion to his deception."