Al-Sa'ib bin Yazid (may Allah be pleased with him) says that Sayyiduna Umar (may Allah be pleased with him) ordered Sayyiduna Ubayy bin Ka'b and Sayyiduna Tamim al-Dari (may Allah be pleased with them both) to lead the people in the night prayer with eleven rak'ahs. The reciter would recite surahs of about a hundred verses each (al-mi'in), so that we would lean on our sticks because of the length of the standing, and we would only return at the break of dawn.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 4616