Exodus 30:8

And when Aaron lighteth the lamps between the two evenings, he shall burn the incense a continual incense before Jehovah throughout your generations.

Exodus 12:6

And ye shall keep it until the fourteenth day of this month; and the whole congregation of the assembly of Israel shall kill it between the two evenings.

Romans 8:34

who is he that condemns? It is Christ who has died, but rather has been also raised up; who is also at the right hand of God; who also intercedes for us.

1 Thessalonians 5:17

pray unceasingly;

Hebrews 7:25

Whence also he is able to save completely those who approach by him to God, always living to intercede for them.

Hebrews 9:24

For the Christ is not entered into holy places made with hand, figures of the true, but into heaven itself, now to appear before the face of God for us:

Treasury of Scripture Knowledge

Summary

And when Aaron lighteth the lamps at even, he shall burn incense upon it, a perpetual incense before the LORD throughout your generations.

Bible References

A perpetual

Romans 8:34
who is he that condemns? It is Christ who has died, but rather has been also raised up; who is also at the right hand of God; who also intercedes for us.
1 Thessalonians 5:17
pray unceasingly;
Hebrews 7:25
Whence also he is able to save completely those who approach by him to God, always living to intercede for them.
Hebrews 9:24
For the Christ is not entered into holy places made with hand, figures of the true, but into heaven itself, now to appear before the face of God for us: