It is narrated from Sa'id bin al-Musayyib that when Sayyiduna Abu Bakr al-Siddiq, may Allah be pleased with him, would come to his bed to sleep, he would perform Witr. And Sayyiduna Umar bin al-Khattab, may Allah be pleased with him, would perform Witr after Tahajjud in the last part of the night. And Sa'id bin al-Musayyib said: As for me, when I come to my bed to sleep, I perform Witr.