Muhammad bin Yazid al-Kula'i محمد بن يزيد الكلاعي · The Book on Jana''iz (Funerals)

"There are three times that the Messenger of Allah prohibited us from performing Salat in, burying our dead in: When the sun's rising appears until it has risen up; when the sun is at the zenith until it passes, and when the sun begins its setting, until it has set."