The answer is: Washed their feet

John 13:5

Before the Last Supper, Jesus, in an incredible act of humility, washed the feet of his disciples. This wasn't just a simple gesture; it was a profound statement about service, love, and the radical leadership style of Jesus. In those times, foot washing was typically reserved for the most lowly servants, as feet were often dusty and dirty from walking the unpaved streets.

Now, imagine the surprise on the disciples' faces as their teacher, their Lord, took on this role! Peter, in typical fashion, impulsively protested, feeling it was inappropriate for Jesus to wash his feet. This back-and-forth led to a pivotal lesson in John 13:7, where Jesus states that one must wash each other's feet to be cleansed and connected.

Interestingly, in many cultures, the act of washing someone’s feet symbolizes hospitality and friendship. Moreover, this gesture echoes forward in history— it reappears in different denominations as a ritual of servitude and humility. Some liturgical traditions even reenact foot washing as a beautiful reminder of how to live as Jesus taught.

Additionally, foot washing parallels Baptism in the way both signify cleansing and rebirth. Here, in the Upper Room, Jesus embodies the essence of servitude, setting an example on how we should engage with one another. It's a timeless call that still resonates today, encouraging all to lead with love and put others before oneself.