I believe Rom 12:3 (according as God hath dealt to every man the measure of faith) relates to all. Some believe that the measure of faith is given only to those who are born again.
For I say, through the grace given to me, to everyone who is among you, not to think
of himself more highly than he ought to think, but to think soberly, as God has dealt to each one a measure of faith. 4 For as we have many members in one body, but all the members do not have the same function, 5 so we,
being many, are one body in Christ, and individually members of one another. 6 Having then gifts differing according to the grace that is given to us,
let us use them: if prophecy,
let us prophesyin proportion to our faith; 7 or ministry,
let us use it in
our ministering; he who teaches, in teaching; 8 he who exhorts, in exhortation; he who gives, with liberality; he who leads, with diligence; he who shows mercy, with cheerfulness.
Romans 12:3-8
This refers to believers who have received a measure of faith for ministry.
JPT