Ṣayḥa is interpreted in two ways:
1. Ṣayḥa is used in the sense of the punishment cry/shout of Gabriel (Jibrīl) in the world; as in the following verses:
So the wrongdoers (that is, the people of Ṣāliḥ) were seized by a ṣayḥa (that is, the ṣayḥa/shout of Gabriel). (Hūd 11:67)
So the wrongdoers (that is, the people of Shuʿayb) were seized by a ṣayḥa (that is, the ṣayḥa/shout of Gabriel). (Hūd 11:94)
As in the command in Sūrat al-Ḥijr:
So the ṣayḥa (that is, the ṣayḥa/shout of Gabriel) seized them at sunrise. (al-Ḥijr 15:73)
2. Ṣayḥa is used in the sense of the first blast of Isrāfīl (the angel who will blow the trumpet) as in the following verses:
It will be but one ṣayḥa (that is, the first blast of Isrāfīl on the Day of Resurrection), and at once they will all be brought before Us. (Yā Sīn 36:53)
The day they will hear the ṣayḥa (that is, the second blast of Isrāfīl calling to the truth)... (Qāf 50:42)