When the ecstasy of devotional service produces some kind of lamentation in connection with Kṛṣṇa, it is called devotional service in compassion. The impetus of this devotional service is Kṛṣṇa's transcendental quality, form and activities. In this ecstasy of devotional service there are sometimes symptoms like regret, heavy breathing, crying, falling on the ground and beating upon one's chest. Sometimes symptoms like laziness, frustration, defamation, humility, anxiety, moroseness, eagerness, restlessness, madness, death, forgetfulness, disease and illusion are also visible. When in the heart of a devotee there is expectation of some mishap to Kṛṣṇa it is called devotional service in bereavement. Such bereavement is another symptom of this devotional service in compassion.
In the Śrīmad-Bhāgavatam, Tenth Canto, 16th Chapter, 13th verse, there is the following description. When Kṛṣṇa was chastising the Kāliyanāga in the Yamunā, the big snake wrapped his coils all over Kṛṣṇa's body, and upon seeing Kṛṣṇa in this situation, all His dear cowherd friends became greatly disturbed. Out of bereavement, distress and fearfulness, they became bewildered and began to fall on the ground. Because the cowherd boys were under the illusion that Kṛṣṇa could be in some mishap, their symptoms are not at all astonishing; they had dedicated their friendship, their possessions, their desires and their very selves to Kṛṣṇa.
When Kṛṣṇa entered the Yamunā River, which had become very poisonous from the presence of Kāliya, Mother Yaśodā feared all kinds of mishaps, and she was breathing hotly. Tears from her eyes were soaking her clothes, and she was almost collapsing.
Similarly, when the Śaṅkhāsura demon was attacking Kṛṣṇa's queens one after another, Lord Baladeva became more and more bluish.
In the Haṁsadūta, the following incident is described: The gopīs requested Haṁsadūta to search after the marks of Kṛṣṇa's lotus feet and to accept them as Lord Brahmā had accepted them on his helmet after he had stolen all Kṛṣṇa's cowherd boys. Regretting his challenge to Kṛṣṇa, Lord Brahmā had bowed down before the Lord, and his helmet became marked with the footprints of Kṛṣṇa. The gopīs reminded Haṁsadūta that sometimes even the great sage Nārada becomes very ecstatic by seeing these footprints, and sometimes great liberated sages also aspire to see them. "You should therefore seek very enthusiastically to find the footprints of Kṛṣṇa," they urged. This is another instance of devotional service in compassion.