Skandapurana 6.3.85.72

6.3.85.72

ātmānaṃ saha yājyena pātayanti na saṃśayaḥ .
śālmalīnāvatulyāḥ syuḥ ṣaṭkarmaniratā dvijāḥ .. 85.72 ..

they cause themselves to sink along with their sacrificer, without a doubt. / Brahmins devoted to the six duties are like a boat of silk-cotton wood;