'Twenty first' in the Bible

In the first month, from the evening of the fourteenth day, let your food be unleavened bread till the evening of the twenty-first day of the month.

The twenty-first Jachin, the twenty-second Gamul,

The twenty-first Hothir, with his sons and his brothers, twelve;

In the seventh month, on the twenty-first day of the month, the word of the Lord came by Haggai the prophet, saying,