Genesis 11:3

Brick.. slime (RM 'bitumen')] These were the regular materials of ancient BabyIonian architecture, as the remains of the oldest cities still show. There was no stone available in these alluvial plains.

God blessed the seventh day and sanctified (RV 'hallowed') it] This is adduced in Exodus as the ground for the observance of the sabbath (see Exodus 20:8 notes, Exodus 31:17; Hebrews 4:4). It was separated from ordinary days, and set apart as a day for rest, and at a later time for holy observance. Further instructions as to its use will be found in Exodus 31:13; Exodus 36:2; The Babylonians observed the 7th, 14th, 19th, 21st and 28th days of the lunar month, as days when men were subjected to certain restrictions: the King was not to eat food prepared by fire, nor offer sacrifice, nor consult an oracle, nor invoke curses on his enemies. But the weekly sabbath came to have a peculiar religious significance among the Hebrews, which is not evident among other nations; and by its regular recurrence every seventh day it was dissociated from its connexion with the moon, and with lunar superstitions.