Frequently mentioned both in the Old and New Testaments. Dogs were used by the Hebrews as a watch for their houses (Isa. 56:10), and for guarding their flocks (Job 30:1). There were also then as now troops of semi-wild dogs that wandered about devouring dead bodies and the offal of the streets (1 Kings 14:11; 16:4; 21:19, 23; 22:38; Ps. 59:6, 14).

As the dog was an unclean animal, the terms “dog,” “dog’s head,” “dead dog,” were used as terms of reproach or of humiliation (1 Sam. 24:14; 2 Sam. 3:8; 9:8; 16:9). Paul calls false apostles “dogs” (Phil. 3:2). Those who are shut out of the kingdom of heaven are also so designated (Rev. 22:15). Persecutors are called “dogs” (Ps. 22:16). Hazael’s words, “Thy servant which is but a dog” (2 Kings 8:13), are spoken in mock humility=impossible that one so contemptible as he should attain to such power.

an animal frequently mentioned in Scripture. It was used by the hebrews as a watch for their houses, (Isaiah 56:10) and for guarding their flocks. (Job 30:1) Then also, as now troops of hungry and semi-wild dogs used to wander about the fields and the streets of the cities, devouring dead bodies and other offal, (1 Kings 14:11; 21:19,23; 22:38; Psalms 59:6) and thus became so savage and fierce and such objects of dislike that fierce and cruel enemies are poetically styled dogs in (Psalms 22:16,20) moreover the dog being an unclean animal, (Isaiah 66:3) the epithets dog, dead dog, dog’s head, were used as terms of reproach or of humility in speaking of one’s self. (1 Samuel 24:14; 2 Samuel 3:8; 9:8; 16:9; 2 Kings 8:13)