If trapped by the enemy, don't fight; Weakening rigidity is beneficial to softness.
Modern translation of the original text
Don't use force to consume the enemy's strength; When the enemy's strength is exhausted, our strength will naturally increase.
Source text
"Make good use of soldiers, avoid their momentum, hit the ground, and cure their qi. Treat the chaos by treating it, and wait for it to be treated. This is also the way to treat the heart. Treat the near as far as possible, treat the work with ease, and satisfy the hunger with food. This is also a rule. " (Sun Wu's Army of the Art of War)
Modern translation of provenance
People who are good at fighting will inevitably avoid the enemy's strong morale and attack when the enemy is tired. This is a way to demoralize the enemy; Strictly organize your own army, wait for the enemy to be chaotic, use your own calmness, and wait for the enemy to be impatient. This is the way to subdue the enemy psychologically. Use troops close to the position to meet distant enemies, use rested troops to attack tired enemies, and use well-fed soldiers to deal with hungry enemies. This is the way to defeat the enemy with strength.