SEV Biblia, Chapter 31:16
Guardarán, pues, el sábado los hijos de Israel: haciendo sábado por sus edades por pacto perpetuo.
Clarke's Bible Commentary - Exodus 31:16
Verse 16. A perpetual covenant.] Because it is a sign of this future rest and blessedness, therefore the religious observance of it must be perpetually kept up. The type must continue in force till the antitype come.
Matthew Henry Commentary
Verses 12-17 - Orders were now given that a tabernacle should be set up for the service of God. But they must not think that the nature of the work and the haste that was required, would justify them in working at it of sabbath days. The Hebrew word /shabath/ signifies rest, or ceasing from labour. The thing signified by the sabbath is that rest in glory whic remains for the people of God; therefore the moral obligation of the sabbath must continue, till time is swallowed up in eternity.
Original Hebrew
ושׁמרו 8104 בני 1121 ישׂראל 3478 את 853 השׁבת 7676 לעשׂות 6213 את 853 השׁבת 7676 לדרתם 1755 ברית 1285 עולם׃ 5769