I have set my rainbow in the clouds,
and it will be the sign of the covenant between me and the earth.
Genesis 9:13

A rainbow in the morning
Is the Shepherd's warning,
But a rainbow at night
Is the Shepherd's delight.

O beautiful rainbow, all woven of light!
There's not in thy tissue one shadow of night;
Heaven surely is open when thou dost appear.
And bending thee above, the angels draw near and sing,
"The rainbow! the rainbow! The smile of God is here."
Sarah Josepha Hale

It takes both the sun and the rain to make a beautiful rainbow.

Rainbow Paintbox
Helen H. Moore

I can see a rainbow,
see it in the sky, see it when the rain has gone away.
All the colors of the rainbow in the sky so high,
I can name them all for you today:

Red there is, a rosy red, a red so bright and bonny,
and orange as a tiger lily leaf, so bold and tawny,

yellow as the blazing sun, that gives us all our light,
and green as grass beneath our feet,
blue as the sky so bright.

There's indigo, as dark as night,
and violet like flowers.

These are the colors nature paints the sky
with after showers.

Hung on the shower that fronts the golden West,
The rainbow bursts like magic on mine eyes!
In hues of ancient promise there imprest,
Frail in its date, eternal in its guise.

Charles T. Turner

Triumphal arch, that fills the sky when storms prepare to part,
I ask not proud Philosophy to teach me what thou art.
Thomas Campbell

Seven roses for seven days!
Now they're over, I go my ways;
With me the thought of a good week goes,
Every day was a rainbow rose.
E. Nesbit

Walk on a rainbow trail,
walk on a trail of song and all about you will be beauty.
There is a way out of every dark mist, over a rainbow trail.
Navajo Poem

God put the rainbow in the clouds, not just in the sky. It is wise to realize we already have rainbows in our clouds, or we wouldn't be here. If the rainbow is in the clouds, then in the worst of time, there is the possibility of seeing hope... We can say 'I can be a rainbow in the cloud for someone yet to be.' That may be our calling.
~~ Maya Angelou