Shiva Purana
शुभं वाप्यशुभं वापि बटुकं न परित्यजेत् ॥ प्राजापत्ये च भोज्ये वै वटुरेको विशिष्यते ॥ ६० ॥
Whether auspicious or inauspicious, the Vaṭuka is not to be eschewed. In the Prājāpatya rite and at the feast a single Vaṭu is considered excellent.
english translation
zubhaM vApyazubhaM vApi baTukaM na parityajet ॥ prAjApatye ca bhojye vai vaTureko viziSyate ॥ 60 ॥
hk transliteration by Sanscript