The answer is: His hip

Genesis 32:25 - During the night-long struggle, the being touched Jacob’s hip socket, dislocating it. This injury left Jacob with a limp, symbolizing his transformation and covenant with God. Some older translations use "hollow of the thigh", which isn't the thigh itself, but the hip socket.

The story of Jacob wrestling with a divine being is packed with intriguing layers, isn't it? Picture this: as the sun begins to rise, Jacob's tired bones ache from a night of grappling. His hip joint, the pivotal point for movement, becomes a symbol of both his vulnerability and the moment he shifts dramatically in his faith journey. The hip injury represents more than just physical pain; it stands as a mark of his transformation.

Now, Jacob's name will change to Israel—meaning "one who wrestles with God"—and here's a fun fact: Israel has since been a source of inspiration, symbolizing the struggle for spiritual truth. It's fascinating to think of how many stories in the Bible highlight humanity's wrestling match—sometimes even literally—with divine will. Another amazing echo in scripture is when Paul writes about running the race of faith. Just like Jacob, who limped his way into a new identity, believers today encounter debates and challenges on their faith journeys, often emerging transformed.

And if we take a closer look at that limp, it serves as a reminder for all of us: embracing our weaknesses can lead to stronger characters and deeper faith. Jacob's enduring injury becomes a Jewish ritual point, celebrated in practice today when kosher laws demand the avoidance of certain parts of the hip. So next time you think about faith and struggles, remember Jacob and how his injury turned into a legacy of grappling with the divine!