'Shirts' in the Bible

And Samson saith to them, 'Let me, I pray you, put forth to you a riddle; if ye certainly declare it to me in the seven days of the banquet, and have found it out, then I have given to you thirty linen shirts, and thirty changes of garments;

and if ye are not able to declare it to me, then ye have given to me thirty linen shirts, and thirty changes of garments.' And they say to him, 'Put forth thy riddle, and we hear it!'