John Trapp on Psalms 78:38

Verſ. 38. But he being full of compaſſion] Not ſtanding upon terms, not taking advantages; a ſin-pardoning God, whoſe Mercy rejoyceth againſt (or glorieth over) Judgement, Jam. 2.13. it is of his mercy that we are not conſumed, Lam. 3.22. if he ſhould deal with us in ſtrict juſtice, Et delicta noſtra ad calculos vocare, there were no abiding by it, Pſal. 130. & 143.

Yea many a time turned he his anger away] With patience and pity, he overcame their provocations, although they tempted him ten times, that is very often, Numb. 14.20.

And did not ſtir up all his wrath] Heb. he multiplied to turn away his wrath, Strenue curavit ut cohiberet iram ſuam, he let fall ſome drops of his wrath, but would not ſhed the whole ſhower of it.