"Remember the sabbath day, to keep it holy."
Exodus 20:8 is the foundational commandment regarding the Sabbath. EGW's statement directly relates to the act of embracing the Sabbath, which is a direct application of the principle in Exodus 20:8.
"Blessed is the man that doeth this, and the son of man that layeth hold on it; that keepeth the sabbath from polluting it, and keepeth his hand from doing any evil."
Both passages connect embracing/keeping the Sabbath with a blessing or positive outcome. Isaiah 56:2 provides a more detailed description of Sabbath keeping, but the core idea aligns with EGW's statement.