A passive command presents the person being protected, not the protector as an active subject. The construction uses command lām + passive jussive imperfect.
Passive imperfectPassive commandMeaning
يُوقَىلِيُوقَLet him be protected
يُوقَيَانِلِيُوقَيَاLet the two be protected
تُوقَىلِتُوقَLet you/her be protected
أُوقَىلِأُوقَLet me be protected
قِ is an active command; لِتُوقَ is a passive command with a separate pattern and meaning.