Revelation 5:8

And when he received the scroll, the four living creatures, and the twenty-four elders fell down before the Lamb, having every one harps, and golden vials full of perfumes, which are the prayers of the saints.

Revelation 8:3-4

And another angel came, and stood before the altar, having a golden censer; and there was given to him much incense, that he might present it with the prayers of all the saints, upon the golden altar which was before the throne.

Treasury of Scripture Knowledge

Summary

Let my prayer be set forth before thee as incense; and the lifting up of my hands as the evening sacrifice.

General references

Bible References

As incense

Revelation 5:8
And when he received the scroll, the four living creatures, and the twenty-four elders fell down before the Lamb, having every one harps, and golden vials full of perfumes, which are the prayers of the saints.
Revelation 8:3
And another angel came, and stood before the altar, having a golden censer; and there was given to him much incense, that he might present it with the prayers of all the saints, upon the golden altar which was before the throne.

General references

Revelation 8:4
And the smoke of the perfumes went up, with the prayers of the saints, from the hand of the angel, before God.