Ijtaza: passed through, Form VIII, root j-w-z.
Na'im: sleeper, an active participle from n-w-m.
Mughma ʿalayhi: a person overcome by unconsciousness.
Ajza'ahu: sufficed for him, Form IV, root j-z-ʾ.
In ajza'ahu dhalika ʿan al-wuquf, dhalika functions as the subject: that actual presence sufficed for the standing.