"A witness unto you"

1. Josh. 24: 27
   27 And Joshua said unto all the people, Behold, this stone shall be a witness unto us; for it hath heard all the words of the Lord which he spake unto us: it shall be therefore a witness unto you, lest ye deny your God.
2. 2 Ne. 29: 8
   8 Wherefore murmur ye, because that ye shall receive more of my word? Know ye not that the testimony of two nations is a witness unto you that I am God, that I remember one nation like unto another? Wherefore, I speak the same words unto one nation like unto another. And when the two nations shall run together the testimony of the two nations shall run together also.
3. Hel. 9: 23
   23 Behold ye say that I have agreed with a man that he should murder Seezoram, our chief judge. But behold, I say unto you, that this is because I have testified unto you that ye might know concerning this thing; yea, even for a witness unto you, that I did know of the wickedness and abominations which are among you.