Psalm 78:34-38 and Numbers 21:4b-9

Psalm 78:34-38
34 When he slew them, then they sought him. And they returned, and they drew near to him in the early morning.
35 And they were mindful that God is their helper and that the Most High God is their redeemer.
36 And they chose him with their mouth, and then they lied to him with their tongue.
37 For their heart was not upright with him, nor have they been living faithfully in his covenant.
38 Yet he is merciful, and he will pardon their sins. And he will not destroy them. And he has abundantly turned aside his own wrath. And he did not enflame his wrath entirely.
Numbers 21:4b-9
And the people began to tire of their journey and hardships.
5 And speaking against God and Moses, they said: "Why did you lead us away from Egypt, so as to die in the wilderness? Bread is lacking; there are no waters. Our soul is now nauseous over this very light food."
6 For this reason, the Lord sent fiery serpents among the people, which wounded or killed many of them.
7 And so they went to Moses, and they said: "We have sinned, because we have spoken against the Lord and against you. Pray, so that he may take away these serpents from us." And Moses prayed for the people.
8 And the Lord said to him: "Make a bronze serpent, and place it as a sign. Whoever, having been struck, gazes upon it, shall live."
9 Therefore, Moses made a bronze serpent, and he placed it as a sign. When those who had been struck gazed upon it, they were healed.