Adding a fifth rakah by mistake: Abu Hanifah said if he did not sit in the fourth he repeats the prayer

Sayyiduna Ibn Abbas (may Allah be pleased with them both) said: I heard the Prophet (peace and blessings be upon him) saying: "When the person in ihram does not find a lower garment, let him wear trousers; and when the person in ihram does not get sandals, let him wear leather socks."

It is narrated from Sayyiduna Jabir (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "Whoever does not get sandals, let him wear leather socks; and whoever does not get a lower garment, let him wear trousers."

It is narrated from Sayyiduna Ibn Umar (may Allah be pleased with them both) that a man said: "O Messenger of Allah (peace and blessings be upon him), what should the person in ihram wear?" Or he asked: "What should the person in ihram leave off?" He (peace and blessings be upon him) said: "The person in ihram shall not wear a shirt, trousers, a turban or leather socks. But if he does not get sandals, then whoever does not get sandals may wear leather socks (cut) below the ankles." It is mentioned that the view of (Imam) Abu Hanifah is: He shall not do this; if he does so, a blood sacrifice (dam) is obligatory on the person in ihram.