'Festal' in the Bible

And Samson said to them, "Let me now put a riddle to you; if you can tell me what it is, within the seven days of the feast, and find it out, then I will give you thirty linen garments and thirty festal garments;

but if you cannot tell me what it is, then you shall give me thirty linen garments and thirty festal garments." And they said to him, "Put your riddle, that we may hear it."

And the Spirit of the LORD came mightily upon him, and he went down to Ash'kelon and killed thirty men of the town, and took their spoil and gave the festal garments to those who had told the riddle. In hot anger he went back to his father's house.