यामिमां पुष्पितां वाचं प्रवदन्त्यविपश्चितः। वेदवादरताः पार्थ नान्यदस्तीति वादिनः ॥

yāmimāṁ puṣhpitāṁ vāchaṁ pravadanty-avipaśhchitaḥ veda-vāda-ratāḥ pārtha nānyad astīti vādinaḥ kāmātmānaḥ swarga-parā janma-karma-phala-pradām kriyā-viśheṣha-bahulāṁ bhogaiśhwarya-gatiṁ prati

Flowery speech is uttered by the foolish, rejoicing in the letter of the Vedas, O Pârtha, saying: "There is naught but this";

In plain words: Krishna says foolish people give fancy speeches and love only the surface words of the Vedas, the ancient holy texts. They claim there is nothing more to religion than that.