Charles Ellicott Commentary Luke 8:13

"And those on the rock [are] they who, when they have heard, receive the word with joy; and these have no root, who for a while believe, and in time of temptation fall away." — Luke 8:13 (ASV)

In time of temptation.—The form of the temptation (or better, trial) is explained by the “tribulation or persecution” of the other two reports. So St. Luke gives “fall away” where the others give “they are offended.”