God took Abram outside and told him to count what, to picture his offspring?

Answer: The stars

The LORD took Abram outside: "Look to the heavens and count the stars, if you are able... So shall your offspring be."

“And the LORD took him outside and said, “Now look to the heavens and count the stars, if you are able.” Then He told him, “So shall your offspring be.””— Genesis 15:5 (BSB)