Pradyumna's attachment for Kṛṣṇa was always exhibited by his action. Whenever he was ordered by his father to execute something, he would immediately execute the order, taking the task as nectarean even though it may have been poison. Similarly, whenever he would find something to be disapproved of by his father, he would immediately reject it as poison, even though it may have been nectarean.
Pradyumna's attachment in anxiety for Kṛṣṇa was expressed when he said to his wife Rati: "The enemy, Śambara, is already killed. Now I am very anxious to see my father, who is my spiritual master and who always carries the conchshell known as Pāñcajanya." Pradyumna felt great separation from Kṛṣṇa when He was absent from Dvārakā at the battlefield of Kurukṣetra. He said, "Since my father has left Dvārakā, I do not take much pleasure in practicing fighting, nor am I interested in any kind of sporting pastimes. And what need is there to speak of these things? I do not even wish to stay at Dvārakā in the absence of my father."
When Pradyumna came back home after killing the Śambarāsura, and as soon as he saw his father, Kṛṣṇa, before him, he became so overjoyed that he himself could not understand his joy on that occasion. This is an instance of success in separation. A similar satisfaction was observed when Kṛṣṇa returned from the battlefield of Kurukṣetra to His home at Dvārakā. All of His sons were so overjoyed that, out of ecstasy, they repeatedly made many mistakes. These mistakes were a sign of complete satisfaction.
Every day Pradyumna looked over Kṛṣṇa's lotus feet with tears in his eyes. These signs of reverential devotion on the part of Pradyumna can be described in the same way they have been described in the case of other devotees.