Strong H1060 בְּכוֹר bekôr · firstborn

Joshua

1. Joshua 6:26
   And Joshua adjured them at that time, saying, Cursed be the man before the Lord, that riseth up and buildeth this city Jericho: he shall lay the foundation thereof in his firstborn, and in his youngest son shall he set up the gates of it.
2. Joshua 17:1
   There was also a lot for the tribe of Manasseh; for he was the firstborn of Joseph; to wit, for Machir the firstborn of Manasseh, the father of Gilead: because he was a man of war, therefore he had Gilead and Bashan.