Sayyiduna al-Sa'ib bin Yazid (may Allah be pleased with him) says that in Ramadan, in the time of Sayyiduna Umar (may Allah be pleased with him), they used to perform the night prayer with twenty rak'ahs, and they would recite surahs of about a hundred verses each (al-mi'in), and in the time of Sayyiduna Uthman bin Affan (may Allah be pleased with him) the people would lean on their sticks because of the length of the standing.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 4617