Who were the first four Muslims to bring faith to the Holy Prophet(PBUH)???

They are the first four Caliphs: Abu Bakr, 'Umar, Uthman and Ali. All four were among the earliest and closest Companions of the Prophet (peace be on him). They lived simple and righteous lives and strove hard for the religion of God.

Explanation:

necessary and proper clause. the congress shall have power to all laws which shall be necessary and proper for carrying into execution the foregoing powers, and all other powers vested by this constitution in the government of the united states, or in any department or officer thereof.