Canonical Reference: Karaniya Metta Sutta (Discourse on Loving-Kindness), Verse 7 Verified Source

“Radiate boundless love towards the entire world — above, below, and across — unhindered, without ill will, without enmity.”

— Gautam Buddha
The Awakened One, Founder of Dhamma
Historical Setting & Context:

Pali Canon: Sutta Nipata 1.8 (Mettasutta) — 'Māna sam bhāvaye aparimāṇaṁ...'.