Who said "Kindness cost nothing. Hulk try to remember this."?

This quote is attributed to Hulk.

Kindness cost nothing. Hulk try to remember this. - Hulk

"Kindness cost nothing. Hulk try to remember this."

Hulk Kindness

"Hulk is strongest one there is."

"Don't make me angry. You wouldn't like me when I'm angry."

"Puny god."

"Hulk smash!"

"A good man treats his wife with respect."

"Kindness always comes back around."

"The power of a smile can change everything."

"Kindness is weakness to some. Not to me."