In his commentary on Saranagati, Srila Bhakti Raksak Sridhar Dev-Goswami Maharaj notes that ‘Sri Nanda Kumar hears their prayers’ means Krishna reciprocates with the surrendered souls in accordance with their prayers. As an example of this, Srila Sridhar Dev Goswami Maharaj cites the following evidence from the scriptures:
sakṛd eva prapanno yas tavāsmīti cha yāchate
abhayaṁ sarvadā tasmai dadāmy etad vrataṁ mama
(Ramayana: Yuddha-kanda, 18.33)
[When Vibhishan, the brother of Ravan, prays to Him for shelter, Ram Chandra proclaims before Hanuman and all His devotees:] “Anyone who even once sincerely surrenders unto Me, declares, ‘I am Yours’, and prays for fearlessness — it is My vow that I will always supply that to them.”