question #3 Sahih al-Bukhari 3455, Book 60, Hadith 122 : What responsibilities do Caliphs have towards those under their guardianship according to Islamic teachings?

The Prophet (ﷺ) said, “The Israelis used to be ruled and guided by prophets: Whenever a prophet died,
another would take over his place. There will be no prophet after me, but there will be Caliphs who
will increase in number.” The people asked, “O Allah’s Messenger (ﷺ)! What do you order us (to do)?” He
said, “Obey the one who will be given the pledge of allegiance first. Fulfil their (i.e. the Caliphs)
rights, for Allah will ask them about (any shortcoming) in ruling those Allah has put under their
guardianship.”