ויקרא, פרק י״ד, פסוק כ״ד

The purification process for a healed leper involves precise rituals to complete their return to the community. As part of these steps, the priest takes the lamb designated for the guilt offering along with a measure of oil and waves them before God [ביאור שטיינזלץ]. This specific waving motion is detailed once again when outlining the offerings brought by a poor leper. The entire procedure is repeated solely to introduce a newly added detail. In practice, the exact same rules and procedures apply equally to the purification process of a wealthy leper [העמק דבר].