Masrouq bin al-Ajda' مسروق بن الأجدع · The Book on Traveling

"I asked the Messenger of Allah about looking around during the Salat. He said: 'It is a portion which the Shaitan snatches during a man's prayer.'"

"The Messenger of Allah would love to start with the right side when he purified himself, and when he combed, and when putting his sandals on."