why

Psalm 119:10, 36
With all my heart I have sought You; do not let me stray from Your commandments. . . .

Psalm 141:4
Do not let my heart be drawn to any evil thing or take part in works of wickedness with men who do iniquity; let me not feast on their delicacies.

Ezekiel 14:7-9
For when any Israelite or any foreigner dwelling in Israel separates himself from me, sets up idols in his heart, and puts a wicked stumbling block before his face, and then comes to the prophet to inquire of Me, I the LORD will answer him Myself. . . .

2 Thessalonians 2:11, 12
For this reason, God will send them a powerful delusion so that they will believe the lie, . . .

and hardened

Isaiah 6:10
Make the hearts of this people calloused; deafen their ears and close their eyes. Otherwise they might see with their eyes, hear with their ears, understand with their hearts, and turn and be healed.

Deuteronomy 2:30
But Sihon king of Heshbon would not let us pass through, for the LORD your God had made his spirit stubborn and his heart obstinate, that He might give him into your hands, as is the case this day.

Joshua 11:20
For it was of the LORD to harden their hearts to engage Israel in battle, that they would be completely destroyed without mercy and be annihilated as the LORD had commanded Moses.

John 12:40
"He has blinded their eyes and hardened their hearts, so that they cannot see with their eyes, and understand with their hearts, and turn, and I would heal them."

Romans 9:18-20
Therefore God has mercy on whom He wants to have mercy, and He hardens whom He wants to harden. . . .

return

Numbers 10:36
And when it came to rest, he would say: "Return, O LORD, to the countless thousands of Israel."

Psalm 74:1, 2
Why have You rejected us forever, O God? Why does Your anger burn against the sheep of Your pasture? . . .

Psalm 80:14
Return, O God of Hosts, we pray! Look down from heaven and see! Attend to this vine,

Psalm 90:13
Return, O LORD! How long will it be? Have compassion on Your servants.

Zechariah 1:12
Then the Angel of the LORD said, "How long, O LORD of Hosts, will You withhold mercy from Jerusalem and the cities of Judah, with which You have been angry these seventy years?"