Musannaf Ibn Abi Shayba 3:1068

Hushaym narrated to us, he said: 'Abbad ibn Maysarah al-Minqari informed us, from Abu Qilabah and al-Hasan, that they were sitting. Abu Qilabah said: Abu al-Darda' said: "Whoever leaves the 'Asr [prayer] until it passes him by without an excuse, his deeds have become void." He said: And the Messenger of Allah (may Allah bless him and grant him peace) said: "Whoever leaves a prescribed prayer until it passes him by without an excuse, his deeds have become void."