בֹּ֭אוּ נִשְׁתַּחֲוֶ֣ה וְנִכְרָ֑עָה נִ֝בְרְכָ֗ה לִֽפְנֵי־יְהוָ֥ה עֹשֵֽׂנוּ׃
Venid, adoremos y postrémonos; Arrodillémonos delante de SEÑOR nuestro hacedor.
Rashi on Psalms
let us kneel Heb. נברכה, an expression of (Gen. 24:11): “He made the camels kneel (ויברך).”
Metzudat David on Psalms
Nishtachaveh- this is lying the entire body on the ground
Metzudat David on Psalms
v'Nichr'ah- this is the bending of the head and part of the body. Nivrechah- this is the bending of the knees down to the earth.