Sushruta Samhita
श्रेष्ठत्वादुत्तरं ह्येतत्तन्त्रमाहुर्महर्षयः । बह्वर्थसङ्ग्रहाच्छ्रेष्ठमुत्तरं वाऽपि पश्चिमम् ॥४३॥
Due to its superiority, this Tantra is considered the best by the great sages. Because it encompasses many aspects of knowledge, it is regarded as superior, even if compared to the later or western ones.
english translation
zreSThatvAduttaraM hyetattantramAhurmaharSayaH । bahvarthasaGgrahAcchreSThamuttaraM vA'pi pazcimam ॥43॥
hk transliteration by Sanscript