God tells Moses to tell Aaron to use his staff to turn all the waters of Egypt to blood, including those stored in wooden and stone containers. When Pharaoh sees the blood, he ignores the sign. In response, all the Egyptians had to dig around the Nile for water to drink since the Nile waters were bloody. Then, God sets a time for the next plague where all the livestock of Egypt dies but none of the Israelites' livestock perish. Those servants of Pharaoh who feared God's word hurried to bring their servants and livestock inside, while those who did not take God seriously left their people and cattle in the fields.

1. Exodus

9. Then the LORD said to Moses, “Tell Aaron,
‘Take your staff and stretch out your hand
over Egypt’s waters–over their rivers, over
their canals, over their ponds, and over all
their reservoirs–so that it becomes blood.’
There will be blood everywhere in the land
of Egypt, even in wooden and stone
containers.”
Exodus 7:19

10. And Pharaoh turned and went into his
house. He did not pay any attention to this.
All the Egyptians dug around the Nile for
water to drink, because they could not drink
the water of the Nile.
Exodus 7:23

20. The LORD set an appointed time, saying,
“Tomorrow the LORD will do this in the
land.” And the LORD did this on the next
day; all the livestock of the Egyptians died,
but of the Israelites’ livestock not one died.
Exodus 9:5

28. Those of Pharaoh’s servants who feared the
word of the LORD hurried to bring their
servants and livestock into the houses, but
those who did not take the word of the
LORD seriously left their servants and their
cattle in the field.
Exodus 9:20