A dual alif is sākin and a light emphatic nūn must stay sākin. Bringing them together in this position fails the usual phonological constraint.
Opening interactive controls...
Why Two Sukūns Matter
The Two Emphatic Nūns: Forms and Rules
A dual alif is sākin and a light emphatic nūn must stay sākin. Bringing them together in this position fails the usual phonological constraint.