Midrash sur Les Juges 14:12

Rabbi José said: From whom do we learn (that there should be) seven days of (the wedding) banquet? From our father Jacob, who || made a banquet with rejoicing for seven days, and he took Leah (as his wife). Again he kept another seven days of banquet and rejoicing, and took Rachel (as his wife), as it is said, "And Laban gathered together all the men of the place, and made a feast" (Gen. 29:22). The Holy One, blessed be He, said to them: Ye have shown loving-kindness to Jacob, My servant. I will give a reward to your children, so that there be no reward for the wicked in the world to come: "Because by him the Lord had given victory unto Syria" (2 Kings 5:1). From whom do we learn (that there should be) seven days of banquet? From Samson the Nazirite of God, for when he went down to the land of the Philistines, he took a wife and kept seven days of banquet and rejoicing, as it is said, "And it came to pass, when they saw him, that they brought thirty companions to be with him" (Judg. 14:11). What were they doing with him? They were eating and drinking and rejoicing, as it is said, "And Samson said unto them, Let me now put forth a riddle unto you" (Judg. 14:12); and another text says, "They could not declare the riddle in three days" (Judg. 14:14).