How many mountains on which he divided the birds?

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

1. He divided them between four mountains. [Ibn ʿAbbās, al-Ḥasan, Qatādah] It is narrated from Ibn ʿAbbās that he divided them into four parts corresponding to the four cardinal directions.
2. He scattered seven portions on seven mountains. [Ibn Jurayj, al-Suddī]