Exodus 10:22
10:22 So Moses extended his hand toward heaven, and there was absolute darkness throughout the land of Egypt for three days.
Exodus 30:31
30:31 And you are to tell the Israelites: ‘This is to be my sacred anointing oil throughout your generations.
Exodus 31:16
31:16 The Israelites must keep the Sabbath by observing the Sabbath throughout their generations as a perpetual covenant.