John Gill Commentary Matthew 26:60

"and they found it not, though many false witnesses came. But afterward came two," — Matthew 26:60 (ASV)

But found none
That were fit for their purpose;

Indeed, though many false witnesses came, yet found they none ;
whose testimonies were sufficient to put him to death, which was what they were resolved upon, or whose witness were not alike and agreed; for according to their law, a man must not die by the mouth of one witness only, but by the mouth of two or three witnesses agreed in a point; and though they might be willing enough to dispense with the law in this case, yet might have some regard to their own character and reputation; and especially as they meant to deliver him to the Roman governor, in order to be condemned by him; they knew they must have a charge, and this supported with a proper evidence, or they could not hope to succeed; for which reason, they could not put up, as they otherwise willingly would, with any sort of witnesses:

at the last came two false witnesses ;
who were agreed in a point, and whose testimonies were alike; at least, had a greater appearance of truth and agreement than the rest; though Mark says, "neither so did their witnesses agree together", (Mark 14:59) , as to prove the point, for which it was given.