'Thing' in the Bible

Again, a new commandment I write unto you, which thing is true in him and in you: because the darkness is past, and the true light now shineth.

And this is the confidence that we have in him, that, if we ask any thing according to his will, he heareth us:

If any one sees a brother man committing a sin which is not unto death, he shall ask and God shall give him life--for those who do not sin unto death. There is such a thing as sin unto death; for that I do not bid him make request.