Abd al-Aziz bin Rufay' narrates: I saw Abdullah bin al-Zubayr (may Allah be pleased with them both) praying two rak'ahs after Asr, and Sayyidah Aishah (may Allah be pleased with her) says: Whenever the Prophet (peace and blessings be upon him) came to my house, he (peace and blessings be upon him) did not omit these two rak'ahs.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 4398