John Gill Commentary Luke 21:5

"And as some spake of the temple, how it was adorned with goodly stones and offerings, he said," — Luke 21:5 (ASV)

And as some spoke of the temple
These were the disciples; Mark says, one of them; but it seems there were more than one; one might begin the discourse, and others join him: how it was adorned with goodly stones and gifts;
(See Gill on Matthew 24:1). he said ;
what follows. This was as he went out of the temple.