How many Angels are there in heavens, their intercessions don’t benefit for them in anyway except after Allah gives Permission for the one whom He intends, and whom He pleases.
Since the Angels do not know the unseen things, they do not know for whom they should intercede. That means the Three Time Knower Lord Allah should give permission to them for intercession in favour of whom He intends and pleases. Adhikr which is mentioned as ‘Unseen’ in verse 2: 3; ‘Permission of Allah’ mentioned in verses 2: 255; 10: 100 and 22: 65 intercedes and makes others interceding. The forerunners who will enter the paradise even without Trial can intercede for the weakling disbelievers as explained in verse 10: 26. See explanation 40: 7-10; 43: 86; and 47: 24.