John Gill Commentary Luke 20:47

"who devour widows` houses, and for a pretence make long prayers: these shall receive greater condemnation." — Luke 20:47 (ASV)

Which devour widows' houses. As the characters of them, in the preceding verse, expose their pride, this shows their avarice; they were very voracious and cruel; they did not spare widows, but devoured their substance.

and for a show make long prayers. To cover their wickedness, pretending great devotion and religion.

the same shall receive greater damnation. Than openly profane sinners; doing such wickedness under a cloak of religion, will aggravate their condemnation; (See Gill on Matthew 23:14).