Albert Barnes Commentary Jeremiah 38:11

"So Ebed-melech took the men with him, and went into the house of the king under the treasury, and took thence rags and worn-out garments, and let them down by cords into the dungeon to Jeremiah." — Jeremiah 38:11 (ASV)

Old cast clouts ... - Rags of torn garments and rags of worn-out garments.