CC Madhya 17.130

ataeva tāra mukhe nā āise kṛṣṇa-nāma
‘kṛṣṇa-nāma’, ‘kṛṣṇa-svarūpa’ — duita ‘samāna’
ataeva — therefore; tāra mukhe — in their mouths; — not; āise — manifests; kṛṣṇa-nāma — the holy name “Kṛṣṇa”; kṛṣṇa-nāma — the holy name “Kṛṣṇa”; kṛṣṇa-svarūpa — the personality of the Lord; duita samāna — both identical.
“Because they are offenders unto Kṛṣṇa, the Supreme Personality of Godhead, who is identical with His holy name, the holy name ‘Kṛṣṇa’ does not manifest in their mouths.