Fast bind, fast find.
This saying is very old, and common to many countries. Shakespeare terms it "a proverb never stale to thrifty minds."
Fat flesh freezes soon.
Fat hens are aye ill layers.
Fat paunches bode lean pows.
Ray explains this by adding, "Full bellies make empty skulls."
Fause folk should hae mony witnesses.
Fausehood maks ne'er a fair hinder-end.
Meaning, that falsehood is sure to be exposed in the long run.
Favours unused are favours abused.