One verse

Srimad Bhagavatam 11.22.7

11.22.7

परस्परानुप्रवेशात् तत्त्वानां पुरुषर्षभ । पौर्वापर्यप्रसङ्ख्यानं यथा वक्तुर्विवक्षितम् ॥ ७ ॥

parasparānupraveśāt tattvānāṁ puruṣarṣabha paurvāparya-prasaṅkhyānaṁ yathā vaktur vivakṣitam

paraspara
mutual
anupraveśāt
because of the entrance (as subtle causes within gross manifestations, and vice versa)
tattvānām
of the various elements
puruṣa-ṛṣabha
O best among men (Uddhava)
paurva
in terms of prior causes
aparya
or of resultant products
prasaṅkhyānam
enumeration
yathā
however
vaktuḥ
the speaker
vivakṣitam
wants to describe

O best among men, because subtle and gross elements mutually enter into one another, philosophers may calculate the number of basic material elements in different ways, according to their personal desire.