Be it ounce, or cat, or bear, pard, or boar with bristled hair, In thy eye that shall appear when thou wakes, it is thy dear. Wake when some vile thing is near.
He He He
Flower of this purple dye, Hit with Cupid's archery, Sink in apple of his eye. When his love he doth espy, Let her shine as gloriously As the Venus of the sky .
Oberon puts love potion on Titania, and later she falls in love with Bottom with donkey's head.
Basically these are scenes that show the characters, Oberon and Puck, that put the love potion on the sleeping which are Titania, Lysander, Demetrius, and after when the potion took effect a lot of problems were created ,and it cause problems to the love triangle.
Pucks puts the potion on Lysander which later falls in love with Helena.
Oberon puts a potion on Demetrius while he is sleeping after the dual between Lysander and him.