1. Depending on how relations stand, there's Pope:

'Awake, my love, disclose thy radiant eyes :
Arise, my wife, my beauteous lady, rise !
Hear how the doves with pensive notes complain,
And in soft murmurs tell the trees their pain ;
The winter's past ; the clouds and tempests fly ;
The sun adorns the fields, and brightens all the sky

Obvs. you'd want to get rid of the wife bit. ;)

The Shakespeare you were thinking of might've been this from Venus & Adonis:

Lo, here the gentle lark, weary of rest,
From his moist cabinet mounts up on high,
And wakes the morning, from whose silver breast
The sun ariseth in his majesty;
Who doth the world so gloriously behold
That cedar-tops and hills seem burnish'd gold.

2. You could just have him say it in Latin? Fertilior seges est alieno semper in arvo is the Erasmus version.

3. Maybe try Ovid or Goethe? I've sadly run out of time to dig around any further, but I hope this is some help!