Vaisesika Sūtras
Vaisesika Sūtra 7.1.02
पृथिव्यादिरूपरसगन्धस्पर्शा द्रव्यानित्यत्वादनित्याश्च ॥२॥
pṛthivyādi-rūpa-rasa-gandha-sparśā dravya-anityatvāt-anityāś-ca ॥2॥
[पृथिव्यादि (pṛthivyādi) - earth and others; रूप (rūpa) - form; रस (rasa) - taste; गन्ध (gandha) - smell; स्पर्शाः (sparśāḥ) - touch; द्रव्य (dravya) - substance; अनित्यत्वात् (anityatvāt) - due to impermanence; अनित्याः (anityāḥ) - impermanent; च (ca) - and;]
Form, taste, smell, and touch in earth and others are impermanent due to the impermanence of the substance.