The Cow - 2:124
"His Lord once tested Abraham with some words, and he added to them: "I will make you a leader of mankind,"(God) said. And when he said, "And from my descendants?", He said, "The wrongdoers will not be included in My Word"."
Abraham's leadership of the people:
The Prophets/21:69
"We said: "O Fire, be cool and safe for Abraham"."
The Prophets/21:70
So they tried to devise a plan for him, but We doomed them to failure.
The Prophets/21:71
And We delivered him and Lot to the land which We had made sacred for all mankind.
The Prophets/21:72
We gave him (Abraham) Isaac and Jacob as a reward, and We made them all righteous.
The Prophets/21:73
We made them leaders guiding by Our command, and We revealed to them how to do good deeds, how to observe the prayer and how to pay the zakat. They were the servants of Us.