Example of English Proverbs Starting with the Letter 'J'

Jack of all trades, master of none.
Jackdaw in peacock's feathers.
Jam tomorrow and jam yesterday, but never jam today.
Jest with an mule and he will flap you in the face with his tail.

Judge not of men and things at first sight.
Judge not, lest ye be judged.
Just as the twig is bent, the tree is inclined.