'Thirty' in the Bible

Others fell on good soil, and yielded fruit: some one hundred times as much, some sixty, and some thirty.

What was sown on the good ground, this is he who hears the word, and understands it, who most certainly bears fruit, and brings forth, some one hundred times as much, some sixty, and some thirty."

and said, "What are you willing to give me, that I should deliver him to you?" They weighed out for him thirty pieces of silver.

Then Judas, who betrayed him, when he saw that Jesus was condemned, felt remorse, and brought back the thirty pieces of silver to the chief priests and elders,

Then that which was spoken through Jeremiah the prophet was fulfilled, saying, "They took the thirty pieces of silver, the price of him upon whom a price had been set, whom some of the children of Israel priced,