It is too late to spare when you reach the dregs of the cask.

This quote is often directly attributed to Seneca, but he is referring to lines 368-369 of Works and Days by the Greek poet Hesiod : Take your fill when the cask is first opened and when it is nearly spent, but midways be sparing: it is poor saving when you come to the lees. (translated by Hugh G. Evelyn-White)

Line 5

Thrift comes too late when you find it at the bottom of your purse. (translator unknown) || It is too late to be thrifty when the bottom has been reached. (translator unknown).