The verse in Tehilim (chapter 146, verse 10) says: “The L-ord will reign forever, thy G-od, O Zion, unto all generations. Hallelujah”.
This powerful verse is declared loudly in a special tune by all children in the synagogue, a moment before the Sefer Torah is returned to the ark.
The letters convey a strong feeling on the unique complexion of the drum skin. The letters coil in towards the word Jerusalem in the center that is made of burning flames.