Charles H. Spurgeon on Psalms 119:165

Great peace. Note that for "peace" the Hebrew word is mylw, shalom:it signifies not only "peace, "but also perfection, wholeness, prosperity, tranquillity, healthfulness, safety, the completion and consummation, of every good thing; and so it is frequently taken by the Hebrews; hence in salutations, wishing one the other well, they say, Pl mylw, shalom lekha, i.e, "peace be with thee"; as if one should say, "may all things be prosperous with thee." Thomas Le Blanc.