What did Ebed-melech tell Jeremiah to put under his arms before he was pulled up?

Answer: Old rags and worn clothes

Ebed-melech lowered old rags and worn-out clothes on ropes so Jeremiah could pad the ropes under his arms.

“Then Ebed-melech took the men with him and went to the king’s palace, to a place below the storehouse. From there he took old rags and worn-out clothes and lowered them with ropes to Jeremiah in the cistern.”— Jeremiah 38:11 (BSB)