'Thousands' in the Bible

So I chose as your tribal leaders wise and well-known men, placing them over you as administrators of groups of thousands, hundreds, fifties, and tens, and also as other tribal officials.

but I show covenant faithfulness to the thousands who choose me and keep my commandments.

May the firstborn of his bull bring him honor, and may his horns be those of a wild ox; with them may he gore all peoples, all the far reaches of the earth. They are the ten thousands of Ephraim, and they are the thousands of Manasseh.