'Thing' in the Bible

Now someone came up to him and said, "Teacher, what good thing must I do to gain eternal life?"

So they went. When he went out again about noon and three o'clock that afternoon, he did the same thing.

The father went to the other son and said the same thing. This boy answered, 'I will, sir,' but did not go.

Peter said to him, "Even if I must die with you, I will never deny you." And all the disciples said the same thing.

So leaving them again, he went away and prayed for the third time, saying the same thing once more.