What does "Allah's blessings" refer to in this āyah?

Imām Ibn al-Jawzī (d. 597/1201) summarized the scholars' opinions in his book "Zād al-Masīr" as follows:

1. The signs they were given, such as the staff, the clouds, the manna and quails, and the splitting of the sea. [Qatāda]
2. The proofs of Allah that demonstrate the truth of the Prophet's (ﷺ) message. [Al-Zajjāj]