What quotes can I use on graphic photographs?

I am a photographer. In an upcoming county fair, I’d like to sell some of my framed prints. On many artistic prints of mine, I like to put quotes at the bottom that match the picture.

It’s illegal (copyright protected) if you didn’t write it and you don’t have the author’s permission. If it’s a quote by someone who’s been dead a long time, maybe older than 100 yrs, the copyright has probably expired and you can use it, unless it’s from a book that has their copyright extended.
Google “quotes” and you should get a lot of usable resources.

Hello Kitty Giant Coloring Pages Set $24.29 Hello Kitty Giant Coloring Pages Set 20 Giant Coloring Pages (13 1/2 in x 19 1/2 in)...

Smurfs Coloring Book & Activity - Smurfs and Smiles $2.50 Smurfs and Smiles! book has 96 sheets of coloring and activity fun! Great for all ages. Paper book is approx. 0.25 inches thick and 8 inches by 11 inches....

BAPTIST BIBLE COLLEGE of Pennsylvania Fans - Defenders Baseball - Create YOUR personal fan ball, we can print your favorite photo, graphic, and text message on our signature balls in FULL color. UM $20.00 Our Photo Balls can be used for gifts, trophies, game balls, awards, holidays, contests, coaches, sponsors, boosters, etc. We can print individual pictures, team photos, school logos, or corporate images including your favorite message or team name. Our Photo Balls are made out of high quality materials similar to regulation balls and are guaranteed for print quality once you receive your personal...

The Official Scrabble Players Dictionary $3.99 The Official SCRABBLE Players Dictionary, Fourth EditionFully revised edition! An inexpensive edition of the book that SCRABBLE players call their bible.Pages: 688...

The Everything Giant Book of Word Searches: Over 300 puzzles for big word search fans! (Everything Series) $9.50 Are you a compulsive word searcher? Do you finish the average word search book in no time? If so, then you'll love The Everything Giant Word Search Book. Our largest word-search puzzle book yet, it's packed with more than 300 easy to challenging puzzles. This huge puzzle collection is the perfect companion for word search fans like you who can't get enough of these addicting pencil puzzlers.Each p...

Majestic Bible Tabs: Traditional Gold-Edged $1.92 Traditional Gold-Edged Bible Tab Set, Large Print Perfect for those who carry their Bible with a sense of style. Gold foil edges and large, easy-to-read print are a visually pleasing way to find favorite Scriptures. 72 gold foil-edged tabs for Bible from 7 inches up to 12 inches. Set includes: Old and New Testament tabs, special notation tabs and a Life Verse tab. Tabs are printed on both si...