Yahya related to me from Malik from Muhammad ibn Yusuf that as-
Sa'ib ibn Yazid said, "Umar ibn al-Khattab ordered Ubayy ibn Kab and
Tamim ad-Dari to watch the night in prayer with the people for eleven
rakas.The reciterof the Qur'an would recite the Mi'in (a group of
medium-sized suras) until we would be leaning on our staffs from
having stood so long in prayer. And we would not leave until the
approach of dawn."