Proverbs 30:5

Every word of God is pure: he is a shield unto them that put their trust in him.
– Proverbs 30:5

Verses 5-6 form a wisdom saying about the trustworthiness of God’s word. This verse echoes a Davidic psalm line that was a part of David’s praise of Yahweh for fulfilling his word and delivering David from his enemies (2 Samuel 22:31). The line also appears in Psalms, such as Psalms 12:6 & 18:30.

The saying uses four terms that are frequent in the Psalms, sometimes all appearing together or in various combinations—word, pure, shield, and trust. Any combination of the terms, and especially a full combination, has strong covenantal implications. The word for word means an utterance, or anything spoken. It appears in all the references cited above. In all these uses, the term refers to the covenant promises of God. The word for pure is more often translated tried and literally means to smelt, refine, or test metal. The meaning is clear in uses such as Psalm 12:6 & Proverbs 25:4. The word for shield can refer to large or small shields, but is often used to speak of God’s encircling protection of those in covenant relationship with him (Psalm 3:3; Proverbs 2:7). The word for trust means to take refuge in and is a figure of the covenant relationship with God, being under his protection (Psalm 2:12; 5:11).

The saying means that God’s covenant promises are trustworthy because they have been tested and found free of any duplicity. Human covenants are often ambiguous and laced with loopholes, but it is not so with God’s covenants. Because his words are so reliable, he is a complete protection and refuge for those who trust in him. It’s worth noting that this verse and other similar verses, like the ones referenced above, are often used as prooftexts for Bible translations. However, none of these verses have anything to do with Bible translations