Shloka 6.31.37
मायाशिरोप्रदर्शनम् (The Display of the Illusory Head of Rāma)
एवंतवहतोभर्ताससैन्योममसेनया ।क्षतजार्द्रंरजोध्वस्तमिदंचस्याहृतंशिरः ।।।।
evaṃ tava hato bhartā sasainyo mama senayā |
kṣatajārdraṃ rajōdhvastam idaṃ ca syāhṛtaṃ śiraḥ ||
Thus your husband, together with his army, has been slain by my forces; and here is his head—wet with blood and smeared with dust—brought back.
"In that way the army of your husband has been killed by Rakshasa army and his decayed head drenched in blood covered with dust has been brought."
It presents a test of satya and dharma: the rākṣasīs attempt deception and psychological cruelty, while Sītā’s dharma is steadfastness and discernment amid false claims.
Sītā is being shown what is claimed to be Rāma’s severed head to break her resolve.
Sītā’s fidelity and inner strength (dhairya), as she is confronted with a deliberate attempt to shatter her faith.