Psalm 90 : 16 NKJV: Let your work appear to Your servants, and Your glory to their children.
Synthetic parallelism has more to do with expanding or advancing an idea or thoughts. The psalmist is making the same request all be it, repetitively. The Hebrews of old saw kids as a part of themselves. When he requests that God makes his handiwork evident he also besseches same for his children. From the phrase "your glory" God's glory and his handiwork in this verse is basically pointing to the same thing. He is asking that God shows his glory to him, but not only him, his heirs, too.