D&C 24:7-10

7For thou shalt devote all thy service in Zion; and in this thou shalt have strength.

8Be patient in afflictions, for thou shalt have many; but endure them, for, lo, I am with thee, even unto the end of thy days.

9And in temporal labors thou shalt not have strength, for this is not thy calling. Attend to thy calling and thou shalt have wherewith to magnify thine office, and to expound all scriptures, and continue in laying on of the hands and confirming the churches.

10And thy brother Oliver shall continue in bearing my name before the world, and also to the church. And he shall not suppose that he can say enough in my cause; and lo, I am with him to the end.