Because God helped the Levites who carried the Ark of the Jehovah's Covenant, they sacrificed seven bulls and seven rams.

Balaam said to him: Build seven altars for me here and bring me seven bulls and seven rams.

So now take seven bulls and seven rams and go to my servant Job and sacrifice a burnt offering for yourselves. My servant Job will pray for you, and I will accept his prayer and not deal with you according to your folly. You did not speak correctly about me, as my servant Job has.

He said to Balak: Build seven altars here for me. Then bring me seven bulls and seven rams.

On the seventh day bring seven bulls, two rams, and fourteen one-year-old lambs that have no defects.

Samuel took a stone and set it up between Mizpah and Shen. He said: Jehovah helped us all the way. He named it: Stone of Help.

When those who carried the Ark of Jehovah walked six steps, David sacrificed a bull and a fattened calf.

Yet my people and I cannot really give you anything. This is because everything is a gift from you, and we have only given back what is yours already.

I will come into your temple with burnt offerings. I will keep my vows to you,

Every day during the seven days of the festival, he must prepare burnt offerings for Jehovah: seven young bulls that have no defects, seven rams that have no defects, and one male goat as an offering for sin.

Having obtained help from God, I continue to this day, witnessing both to small and great, saying no other things than those that the prophets and Moses said should come.

To the one an aroma of death leading to death and to the other an aroma from life to life. And who is sufficient for these things?

We are not adequate by ourselves to account for anything. Our adequacy is from God.

Treasury of Scripture Knowledge

Summary

And it came to pass, when God helped the Levites that bare the ark of the covenant of the LORD, that they offered seven bullocks and seven rams.

Bible References

God

Yet my people and I cannot really give you anything. This is because everything is a gift from you, and we have only given back what is yours already.
Samuel took a stone and set it up between Mizpah and Shen. He said: Jehovah helped us all the way. He named it: Stone of Help.
Having obtained help from God, I continue to this day, witnessing both to small and great, saying no other things than those that the prophets and Moses said should come.
To the one an aroma of death leading to death and to the other an aroma from life to life. And who is sufficient for these things?
We are not adequate by ourselves to account for anything. Our adequacy is from God.

They

When those who carried the Ark of Jehovah walked six steps, David sacrificed a bull and a fattened calf.
I will come into your temple with burnt offerings. I will keep my vows to you,

Bullocks

He said to Balak: Build seven altars here for me. Then bring me seven bulls and seven rams.
On the seventh day bring seven bulls, two rams, and fourteen one-year-old lambs that have no defects.
So now take seven bulls and seven rams and go to my servant Job and sacrifice a burnt offering for yourselves. My servant Job will pray for you, and I will accept his prayer and not deal with you according to your folly. You did not speak correctly about me, as my servant Job has.
Every day during the seven days of the festival, he must prepare burnt offerings for Jehovah: seven young bulls that have no defects, seven rams that have no defects, and one male goat as an offering for sin.
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