Suetonius,
The Lives of the Twelve Caesars…
“ Quintus Catulus had a dream, for two nights successively after his dedication of the Capitol. The first night he dreamt (140) that Jupiter, out of several boys of the order of the nobility who were playing about his altar, selected one, into whose bosom he put the public seal of the commonwealth, which he held in his hand; but in his vision the next night, he saw in the bosom of Jupiter Capitolinus, the same boy ”
