Exodus 4:

And Moses said unto the Lord, O my Lord, I am not eloquent…I am slow of speech, and of a slow tongue….And the anger of the Lord was kindled against Moses, and he said, Is not Aaron the Levite thy brother? I know that he can speak well….Thou shalt speak unto him, and put words in his mouth: and I will be with thy mouth, and with his mouth, and will teach you what ye shall do. And he shall be thy spokesman unto the people: and he shall be, even he shall be to thee instead of a mouth, and thou shalt be to him instead of God.

Colorado Republican Federal Campaign Committee v. Federal Election Commission (1996), Thomas concurring and dissenting:

When an individual donates money to a candidate or to a partisan organization, he enhances the donee’s ability to communicate a message and thereby adds to political debate, just as when that individual communicates the message himself. Indeed, the individual may add more to political discourse by giving rather than spending, if the donee is able to put the funds to more productive use than can the individual. The contribution of funds to a candidate or to a political group thus fosters the “free discussion of governmental affairs,” Mills v. Alabama, 384 U.S. 214, 218 (1966), just as an expenditure does.