then whoever turns away after this,"
from fulfilling this pledge and covenant,
فَأُوْلَـيِكَ هُمُ الْفَاسِقُونَ
they are the rebellious.
Ali bin Abi Talib and his cousin Abdullah bin Abbas said,
"Allah never sent a Prophet but after taking his pledge that if Muhammad were sent in his lifetime, he would believe in and support him."
Allah commanded each Prophet to take a pledge from his nation that if Muhammad were sent in their time, they would believe in and support him.
Tawus, Al-Hasan Al-Basri and Qatadah said,
"Allah took the pledge from the Prophets that they would believe in each other,"
and this statement does not contradict what Ali and Ibn Abbas stated.
Therefore, Muhammad is the Final Prophet until the Day of Resurrection. He is the greatest Imam, who if he existed in any time period, deserves to be obeyed, rather than all other Prophets. This is why Muhammad led the Prophets in prayer during the night of Isra when they gathered in Bayt Al-Maqdis (Jerusalem).
He is the intercessor on the Day of Gathering, when the Lord comes to judge between His servants. This is Al-Maqam Al-Mahmud (the praised station) (refer to 17;79) that only Muhammad deserves, a responsibility which the mighty Prophets and Messengers will decline to assume. However, Muhammad will carry the task of intercession, may Allah's peace and blessings be on him