The answer is: elbow

Gen 47:31 ...and he swore to him. Then IsraEL BOWed himself...

In the intricate dance of scripture, wordplay mingles delightfully with deep meanings. The passage from Genesis acknowledges a profound moment of submission. Israel, also known as Jacob, bowed, symbolizing humility and reverence. This act is laced with layers of meaning, not only promoting humility but also foreshadowing how act connects directly with the heart's posture towards the Divine.

When reflecting on "elbow" in this hidden gem, isn’t it amusing how this body part often represents our willingness to “roll up our sleeves” in engagement with the world? Just like Israel’s bowing, our elbow can remind us of the practical actions we need to take in faith—whether sweeping, shaking hands, offering support, or doing chores for charity.

For those aware of Biblical idioms and imagery, there’s a reminder here of how physical gestures align with spiritual messages. Bowing isn't just physical; in worship, it harbors emotional expressiveness, echoing narratives throughout scripture. In James 4:10, tying humility to God’s elevation continuously illustrates this thematic element.

Here's a tidbit: ancient customs across cultures reflected the significance of bowing—something strongly present in both Hebrew traditions as well as modern observances today. Listing bows throughout scripture, from kings to angels, showcases how this act was foundational in establishing a correct and reverent relationship with not just God, but with one another too. A beautiful reminder of life’s interconnected tapestry!