Mahāsatipaṭṭhānasutta

Suttapiṭaka · Dīghanikāya · Mahāvagga · Vol. 10 · Section 281

[281] Furthermore, bhikkhus, just as a bhikkhu might see a body discarded in a charnel ground (sivathikā) — a skeleton with flesh and blood, held together by sinews …

English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.

This passage also appears in 1 other place

Vol. 12 · Section 138 — Saṁpajaññababba