Surah Al Imran Tafseer

Verily, among mankind who have the best claim to Ibrahim are those who followed him, and this Prophet and those who have believed. And Allah is the Wali (Protector and Helper) of the believers.

This Ayah means,

"The people who have the most right to be followers of Ibrahim are those who followed his religion and this Prophet, Muhammad, and his Companions from the Muhajirin, Ansar and those who followed their lead."

Sa`id bin Mansur recorded that Ibn Mas`ud said that the Messenger of Allah said,

إِنَّ لِكُلِّ نَبِيَ وُلَاةً مِنَ النَّبِيِّينَ وَإِنَّ وَلِيِّي مِنْهُمْ أَبِي وَخَلِيلُ رَبِّي عَزَّ وَجَل

Every Prophet had a Wali (supporter, best friend) from among the Prophets. My Wali among them is my father Ibrahim, the Khalil (intimate friend) of my Lord, the Exalted and Most Honored.

The Prophet then recited,

إِنَّ أَوْلَى النَّاسِ بِإِبْرَاهِيمَ لَلَّذِينَ اتَّبَعُوهُ

(Verily, among mankind who have the best claim to Ibrahim are those who followed him...).

Allah's statement,

وَاللّهُ وَلِيُّ الْمُوْمِنِينَ

And Allah is the Wali (Protector and Helper) of the believers.

means, Allah is the Protector of all those who believe in His Messengers