Ayonisomanasikārasutta

Suttapiṭaka · Saṁyuttanikāya · Mahāvaggasaṁyutta · Vol. 19 · Section 487

[487] Bhikkhus, for one who attends wisely (yoniso manasikaroto), the unarisen mindfulness factor of awakening (sati-sambojjhaṅga) arises, and the arisen mindfulness factor of awakening goes to fulfillment by development (bhāvanā) …

English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.

This passage also appears in 1 other place

Vol. 19 · Section 443 — Ṭhāniyasutta