Musannaf Ibn Abi Shayba 3:3180

Hushaym narrated to us, from Abbad ibn Rashid, from al-Hasan, regarding the saying of Allah: "Hasten to the remembrance of Allah." He said: "By Allah, it is not hastening on foot, for they have been forbidden from coming to the prayer unless they are upon tranquility and dignity. Rather, it is with the hearts, and steadfastness, and humility."