How do we know that the word בְּרָכָה (blessing) comes from the word בָּרוּךְ (blessed)? Perhaps it comes from the word בֶּרֶךְ (knee). It is written (Isaiah 44:23), "For to Me shall every knee bend." The Place to which every knee bends. What example does this resemble? People want to see the king, but do not know where to find his house. First they ask "Where is the king's house?" Only then can they ask "Where is the king?" It is thus written, "For to Me shall every knee bend" — even the highest — "every tongue shall swear."