What does the pronoun in "after it/him" 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. It refers back to Moses, meaning "after his departure to the mountain," [Ibn ʿAbbās, Muqātil]
2. It refers back to "the coming" of Moses.