hi is optionally substituted for dhā (dadhāti) before an affix beginning with t and having an indicatory k ,
As हितः, हितवत्, हित्वा ॥,
Adhyāya 7 · Pāda 4 · Rule 42
hi is optionally substituted for dhā (dadhāti) before an affix beginning with t and having an indicatory k ,
As हितः, हितवत्, हित्वा ॥,