Vocabulary
釈迦に説法
しゃかにせっぽう
teaching your grandmother to suck eggs; teaching something to someone who knows more than you; preaching to the choir; lecturing to the Buddha
expression
Example sentences
釈迦に説法（しゃかにせっぽう）。
Don't teach fish to swim.
それは釈迦に説法（しゃかにせっぽう）というもの。
That's like carrying coals to Newcastle.