הֲ֭תֵדַע עַל־מִפְלְשֵׂי־עָ֑ב מִ֝פְלְא֗וֹת תְּמִ֣ים דֵּעִֽים׃
Rashi on Job
the revelations of the clouds Heb. מפלשי, the revelation of the clouds, an expression of an open (מפלש) alley, i.e., to the length and the width of the clouds.
Rashi on Job
Do you know concerning them, the wonders of Him Who is perfect in knowledge?