Where does it come from? Google can’t help me
It sounds like “豈曰無衣・與子同袍”.
It is from the poem “無衣” in the Book of Odes:
How shall it be said that you have no clothes?
I will share my long robes with you.
The quote is from an ancient Chinese poem collection 诗经（詩經 the Book of Odes）. The original full poem is as follows (the quote in question is the first eight characters in the poem):
If you prefer traditional Chinese, below is the same poem in traditional Chinese:
In addition, this quote was particularly popular recently because it was widely used to show friendship during this difficult period that we are all experiencing.