'Fifty' in the Bible

Let fifty days be numbered, to the day after the seventh Sabbath; then you are to give a new meal offering to the Lord.

And you will put the value of a male from twenty years to sixty years old at fifty shekels of silver, by the scale of the holy place.

And if a man gives to the Lord part of the field which is his property, then let your value be in relation to the seed which is planted in it; a measure of barley grain will be valued at fifty shekels of silver.