The Visnudutas were also surprised that the Yamadutas, although claiming to be servants of Yamaraja, the supreme judge of religious principles, were unaware of the principles of religious action
SB Canto 6
Śukadeva Gosvāmī continued: Being thus addressed by the messengers of Yamarāja, the servants of Vāsudeva smiled and spoke the following words in voices as deep as the sound of rumbling clouds.
The Yamadūtas were surprised to see that the Viṣṇudūtas, although polite, were hindering the rule of Yamarāja. Similarly, the Viṣṇudūtas were also surprised that the Yamadūtas, although claiming to be servants of Yamarāja, the supreme judge of religious principles, were unaware of the principles of religious action. Thus the Viṣṇudūtas smiled, thinking, "What is this nonsense they are speaking? If they are actually servants of Yamarāja they should know that Ajāmila is not a suitable candidate for them to carry off."