What is the interpretation of the phrase "Thār Allāh" (Vengeance of Allah/Blood of Allah), and what is the ruling on using a gift that has "Labbayka Thār Allāh" (Here I am at your service, Thār Allāh) written on it?

"Labbayk" means "I respond [to your call]," and the omission of the vocative particle is common in Arabic and the Quran. "Labbayk Thaar Allah" means "I have responded/will respond to you, O Vengeance of Allah." There is no harm in uttering it if the aim is to rouse enthusiasm for zeal and vengeance for the religion of Allah, similar to saying "Wa Islamah!" (O for Islam!). However, the Rafidah use it with the intention of avenging Al-Husayn ibn Ali, and they falsely accuse the Sunnis of killing him, even though those who killed Al-Husayn died centuries ago. These phrases aim to incite their followers to kill Sunnis, even though the Quran says: (And no bearer of burdens will bear the burden of another). This reveals the Rafidah's hatred for the Sunnis. The Rafidah write these phrases on gifts and food during the commemoration of Al-Husayn's death to win people over. Therefore, one must be wary of them, their books, and their misguidance, and not accept anything that comes from them in this manner.