Jesus and his disciples sat down near the place where people would put their offerings and they all sat there and watched the crowds putting their money in the temple's treasury.
In Jerusalem there were many rich people, these rich people spent all of their other money on the largest houses and all the food and treasure they could have. Before donating!
So these rich people walked up to the donations and poured their bags of money into the box making everyone aware of how much they had donated including Jesus
But a poor widow came and put in two very small copper coins into the box, which were worth only a few cents. Jesus noticed this.
Jesus called upon his disciples and said this poor widow has put more into the treasury than the richest and anyone else who has put the money in. They gave out of their wealth; but she, out of her poverty, put in everything—all she had to live on.