Do you recognize a poem about Advice?

Question

Parts that I remember:

"...makes...better/ Do not wash a cashmere sweater/...A stitch in time saves 90 stitches/Give the rich, to please them, riches./Give to love your hearth and hall/But do not give advice at all."

Answer 1

A GARLAND OF PRECEPTS
by Phyllis McGinley

Though a seeker since my birth,
Here is all I’ve learned on earth,
This is the gist of what I know:
Give advice and buy a foe.
Random truths are all I find
Stuck like burs about my mind.
Salve a blister. Burn a letter.
Do not wash a cashmere sweater.
Tell a tale but seldom twice.
Give a stone before advice.

Pressed for rules and verities,
All I recollect are these:
Feed a cold to starve a fever.
Argue with no true believer.
Think-too-long is never-act.
Scratch a myth to find a fact.
Stich in time saves twenty stitches.
Give the rich, to please them, riches.
Give to love your hearth and hall.
But do not give advice at all.

Answer 2

The saying is, "a stitch in time saves nine" which means: Take care of problems while they are small, or they turn into big problems.