'Formal' in the Bible
"Let me tell you a riddle," Samson told them. "If you can solve it during this week-long festival, I'll give you 30 linen garments and 30 formal garments.
But if you don't solve it, then you'll give me 30 linen garments and 30 formal garments." "Tell us your riddle and we'll solve it," they responded.
So Abner told David, "Give me permission to go out and rally all of Israel to your majesty the king so they can enter into a formal agreement with you to reign over everything that your heart desires." So David sent Abner off, and he went away in peace.