This is Vaiṣṇava consideration. They are firmly determined not to bother Kṛṣṇa with anything. Simply to serve Him. Ānukūlyena kṛṣṇānuśīlanam (CC Madhya 19.167). Similarly, Kṛṣṇa also finds opportunity when to serve His devotee. This is the reciprocation. The devotee wants to serve Kṛṣṇa without any return, and Kṛṣṇa also wants to serve devotee whenever there is opportunity. This is the transaction of love: not to take anything return.
- āśliṣya vā pāda-ratāṁ pinaṣṭu mām
- marma-hatāṁ karotu vā adarśanān
- yathā tathā vā vidadhātu lampaṭo
- mat-prāṇa-nāthas tu . . .
- (CC Antya 20.47)
This is Caitanya Mahāprabhu's teaching, that "From Kṛṣṇa's side, He may do whatever He likes"—that is full surrender—"still, He is my master. He's nobody else. He is still my worshipable master." Bhaktivinoda Ṭhākura has sung,
- mānasa deho geho jo kichu mor
- arpiluṅ tuwā pade nanda-kiśor
Nanda-kiśora is Kṛṣṇa. So this is full surrender. "My dear Nanda-kiśora, whatever I have got, now I am offering everything to You." What I have got? Mānasa deho geho: "I have got my body, I have got my mind, and a so-called home or a wife or a few children. What I have got? So everything is offered to You." Mānasa deho geho jo kichu mor. This is full surrender. Now he says, mārobi rākhobi jo icchā tohārā: "I am surrendering to You everything. Now if You like You can save me, or if You like You can kill me." This is full surrender.
So these Pāṇḍavas are the best example, and better than the Pāṇḍavas, there are other devotees. And the topmost surrendered devotee are the gopīs.