'Thirty' in the Bible

But other seeds fell on good soil and produced grain, some a hundred times as much, some sixty, and some thirty.

But as for the seed sown on good soil, this is the person who hears the word and understands. He bears fruit, yielding a hundred, sixty, or thirty times what was sown."

and said, "What will you give me to betray him into your hands?" So they set out thirty silver coins for him.

Now when Judas, who had betrayed him, saw that Jesus had been condemned, he regretted what he had done and returned the thirty silver coins to the chief priests and the elders,

Then what was spoken by Jeremiah the prophet was fulfilled: "They took the thirty silver coins, the price of the one whose price had been set by the people of Israel,