Which poem does the serial killer Red John recite to Patrick James in the U.S. TV series "The Mentalist"?

The serial killer Red John recites the poem "Tyger, Tyger" by William Blake to Patrick James in the U.S. TV series "The Mentalist". The poem is:

"Tyger Tyger, burning bright,

In the forests of the night;

What immortal hand or eye,

Could frame thy fearful symmetry?"

This poem is introduced in season 2's finale episode "Red Sky in the Morning". Red John (shortened as "RJ'", or "RJK" for "Red John Killer", in the FBI and CBI case files), is the alias of the central antagonist in "The Mentalist" during its first six seasons, from the pilot to the episode where Red John is killed.

While he was alive, Red John was California's most notorious serial killer, who murdered at least 41 people (and many more by proxies). He was also the founder of the Blake Association, a secret criminal organization of law enforcement officials that committed and covered up his crimes.

Red John's murder of Patrick Jane's wife and daughter 5 years prior the start of the series prompted Jane to leave his old life as a fake psychic and enlist in the CBI. He had to find and take revenge against his family's killer; kicking off the events of the series.