Hafs bin Asim says: We went out with Sayyiduna Abdullah bin Umar (may Allah be pleased with him) and (at one place) performed the obligatory prayer. Then Sayyiduna Ibn Umar (may Allah be pleased with him) saw that some of his sons were performing the Sunnah prayers, so he said: I have performed prayers with the Noble Prophet (peace and blessings be upon him), Sayyiduna Abu Bakr, Sayyiduna Umar, and Sayyiduna Uthman (peace and blessings be upon them), and they did not perform the Sunnah prayers before or after (the obligatory prayer). Then he said: If I had to perform this voluntary prayer, I would have completed (the obligatory prayer as well).