Musannaf Ibn Abi Shayba 23:92

Hushaym narrated to us, he said: 'Abbad ibn Maysarah al-Minqari informed us, from Abu Qilabah and al-Hasan, that they were both 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 al-Hasan said: The Messenger of Allah (peace and blessings of Allah be upon him) said: "Whoever leaves a prescribed prayer until it passes him by without an excuse, his deeds have become void."