佛頂尊勝陀羅尼經教跡義記 2.9

2.9

唐云歸命也。解曰：歸命者稽首之稱，稽者至也，首者頭也。世尊敬禮也，以頭至地，故云稽首。通三業敬，意顯福田摧我慢故，敬跪之極令物生善故。又曩謨者，敬禮之名。歸命者，依投義，歸還本源，依令證實。

In Chinese, [namo] means “taking refuge with one's life.” Explanation: “Taking refuge with one's life” is an expression for bowing the head. Ji means to reach, and shou means the head. One reverently pays homage to the World-Honoured One, bringing the head down to the ground; hence it is called “bowing the head.” It encompasses reverence with the three karmas, with the intention of revealing the field of merit and destroying arrogance, reaching the utmost in reverent prostration to cause beings to give rise to wholesome roots. Furthermore, namo is the term for paying reverent homage. “Taking refuge with one's life” has the meaning of relying on and surrendering to: returning to the original source, relying on it to cause one to realize reality.