"Abu Usayd Malik ibn Rabi'a as-Sa'idi said, "Once while we were sitting with the Messenger of Allah, may Allah bless him and grant him peace, a man from the Banu Salama came up and asked, 'O Messenger of Allah, is there any devotion to my parents which I can show them after their death?' He said, 'Yes, praying for them, asking forgiveness for them, fulfilling their pledges after them, maintaining ties with relations which are only maintained through them, and honouring any friend of theirs." [Abu Dawud]"