Musannaf Ibn Abi Shaybah

It is narrated from Hazrat Aamir bin Masood that the Messenger of Allah, peace and blessings be upon him, said: "The fast of winter is a cool bounty."

Hazrat Umar says that winter is a blessing for the worshipper.

Hazrat Mujahid says that when the winter season would come, Hazrat Ubaid bin Umair used to say: O people of the Qur'an! The night has become long for your prayers and the day has become short for your fasting. Consider this a blessing.