In Book Six of the Masnavi (Section 112), during the narrative of the three princes who fall into tribulation at the Hoosh-Roba Fortress, the eldest brother delivers a profound discourse on the spiritual virtue of patience (sabr) amidst severe hardship. He reminds his distressed siblings that patience is the 'key to relief' (al-sabr miftah al-faraj) and must be maintained steadfastly. By urging them to endure the fiery furnace of affliction with grace, the discourse highlights the necessity of true spiritual resilience over superficial complaining when confronted with divine trials.