In وَرَسُولُهُ أَحَقُّ, the lām before hāʾ has ḍammah and the following pronounced hamzah has fatḥah. Both sides are vowelled, so the ḍammah-bearing hāʾ receives ṣilah in connected recitation.
The following hamzah matters: the source’s note says the appropriate madd rule also applies in this situation.
Opening interactive controls...
Application: wa rasūluhū aḥaqq
Rules of Hāʾ al-Ḍamīr: Vowels, Ṣilah and Exceptions
In وَرَسُولُهُ أَحَقُّ, the lām before hāʾ has ḍammah and the following pronounced hamzah has fatḥah. Both sides are vowelled, so the ḍammah-bearing hāʾ receives ṣilah in connected recitation.
The following hamzah matters: the source’s note says the appropriate madd rule also applies in this situation.