||Do not take the name of God your Lord in vain. God will not allow the person who takes His name in vain to go unpunished.
Lo tisa et-shem-Adonay Eloheycha lashav ki lo yenakeh Adonay et asher-yisa et-shmo lashav.
||Observe the Sabbath to keep it holy, as God your Lord commanded you.
Shamor et-yom hashabat lekadsho ka'asher tsivecha Adonay Eloheycha.
Or, 'safeguard.' 'Remember' in Exodus 20:8. The earlier generation had experienced the Sabbath with the Manna (Exodus 16:26), and therefore merely had to remember it. However, the generation that would enter the promised land, whom Moses was addressing, would henceforth have to 'safeguard' the Sabbath (cf. Chizzkuni). According to tradition, the Ten Commandments were given prophetically, and at Sinai the people heard the words 'remember' and 'observe' simultaneously (Mekhilta on Exodus 20:8; Rashi).
|as God...commanded you|
At Sinai (Ibn Ezra; Bachya; Tur). Or, according to tradition, at Marah (Sanhedrin 56b; Rashi; See Exodus 15:25).