Then Joshua said to the people, You are witnesses against yourselves that you have chosen the Lord, to serve Him. And they said, We are witnesses.
2 Samuel 1:16
David said to [the fallen man], Your blood be upon your own head; for you have testified against yourself, saying, I have slain the Lord's anointed.
Thus you are testifying against yourselves that you are the descendants of those who murdered the prophets.
For our transgressions are multiplied before You [O Lord], and our sins testify against us; for our transgressions are with us, and as for our iniquities, we know and recognize them [as]:
O Lord, though our iniquities testify against us [prays Jeremiah], deal and work with us for Your own name's sake [that the heathen may witness Your might and faithfulness]! For our backslidings are many; we have sinned against You.
Your gold and silver are completely rusted through, and their rust will be testimony against you and it will devour your flesh as if it were fire. You have heaped together treasure for the last days.