"Five Happiness within Four Seas" is the literal translation. "Four Seas" means the world, as in English's Seven Seas. The Five Happiness are 1. Longevity 2. Wealth & Nobility 3. Health & Peace/Serenity (no upheavals in life), 4. To lead a virtuous life i.e. be benevolent 5. Meeting a good end. This means not to die by execution, violent death etc but to die peacefully in sleep. Figuratively, "may you find blessings wherever you go".