I will say unto God my rock,.... A name frequently given to the eternal God, Father, Son, and Spirit, Deu 32:4; See Gill on Psa 18:2; why hast thou forgotten me? See Gill on Psa 13:1; why go I mourning because of the oppression of the enemy? meaning perhaps Saul; though it may be applied to any spiritual enemy, sin, Satan, and the world; who are very oppressive and afflicting, and occasion continual mourning to the children of God.