لَمْ يُجْزِهِمَا عَنْ حَجَّةِ الْإِسْلَامِ
Translation: It does not suffice for their obligatory Hajj.
Lam negates and makes the following imperfect jussive; yujzi is the jussive verb, with -humā referring to the two persons; ʿan ḥajjat al-Islām specifies the obligation not discharged.