Abu Ishaq al-Sabay'ai' أبو إسحاق السبيعي عمرو بن عبد الله · The Book of the Prayer

The Prophet said: "Pray the Subh early, for indeed its reward is greater" or "your reward."

"We were with the Messenger of Allah on a campaign, and he said: 'Hasten to perform prayer on a cloudy day, for whoever misses the 'Asr prayer, all his good deeds will be in vain.'"