The Buddha said to Anathapindika:
“In the past, householder, there was a brahmin named Velama. He gave such a great alms offering as this: eighty-four thousand bowls of gold filled with silver; eighty-four thousand bowls of silver filled with gold; eighty-four thousand bronze bowls filled with bullion; eighty-four thousand elephants, chariots, milch cows, maidens, and couches, many millions of fine cloths, and indescribable amounts of food, drink, ointment, and bedding.
“As great as all this might be, it would be even more fruitful if one would develop a mind of loving-kindness even for the time it takes to pull a cow’s udder.
"And as great as all this might be, it would be even more fruitful still if one would develop the perception of impermanence just for the time it takes to snap one’s fingers.”
Bodhi, Bhikkhu (2005-08-10). In the Buddha's Words: An Anthology of Discourses from the Pali Canon (pp. 178-180). Perseus Books Group. Kindle Edition.