Talmud zu Bereschit 18:5

Say little and do a lot. How so? This teaches us that the righteous say little and do a lot, but the wicked say a lot and don’t do anything at all. And how do we know that the righteous say little and do a lot? For this is what we find with Abraham our forefather, who said to the angels, “Have a piece of bread with me today,” as it says (Genesis 18:5), “I will get a piece of bread, and you can dine to your heart’s content.” But then after that, look at what Abraham did for the angels who serve God! He went and prepared three bulls and nine measures of fine flour for them! And how do we know that he prepared nine measures of fine flour? Because it says (Genesis 18:6), “Abraham hurried into the tent, to Sarah, and said: Hurry! Three measures of fine flour! The word three refers to the first three [measures], the word fine brings it to six, and the word flour makes nine. And how do we know that he prepared three bulls for them? Because it says (Genesis 18:7), “Abraham ran to the cattle [and selected a good, tender calf].” Cattle is one [bull]. Calf is two. Tender is three. (And some say that good was four.) “Then he gave it to the boy, who hurried to prepare it.” That is, he gave it to Ishmael, in order to train him in performing the mitzvot.
Even the Holy Blessed One said little and did a lot, as it says (Genesis 15:13–14), “[God] said to Abram: Know well that your offspring will be strangers in a land not their own, and they shall be enslaved and oppressed for four hundred years. But I will judge the nation that they serve, and afterward they shall go out with great wealth.” God spoke of this judgment with only the two letters dalet and nun, which spell the word dan (judge). But when the time came to pay back the enemies of Israel, God used seventy-two letters to do it, as it says (Deuteronomy 4:34), “Or has any god attempted to come and take one nation out from another, with great acts, signs, and wonders, and with awesome power?” From this you learn that when the enemies of Israel were made to pay for what they had done, they paid with seventy-two letters.
And how do we know that the wicked say a lot and don’t do anything at all? For this is what we find with Ephron, who said to Abraham (Genesis 23:15), “A piece of land worth four hundred pieces of silver; [what is that between you and me?]” [as if he was willing to give away the land for free]. But in the end, when Abraham went to give him the payment, it says, “Abraham understood Ephron, and paid him the money” [and he simply accepted it].