Literature Reference: 翩翩两玄鸟，本是同巢燕。—— 《寓意诗五首 四》 Two dark birds fluttering, originally from the same nest.— From 'Five Allegorical Poems IV'.
同: Identical; the same.
巢: Nest, the lair. Exercise caution in its use.
Meaning: Sharing the same nest signifies close bonds and growth together, symbolizing deep friendship and unity.