Walter Scott said this quote

Of this fickle temper he gave a memorable example in Ireland, when sent thither by his father, Henry the Second, with the purpose of buying golden opinions of the inhabitants of that new and important acquisition to the English crown. Upon this occasion the Irish chieftains contended which should first offer to the young Prince their loyal homage and the kiss of peace. But, instead of receiving their salutations with courtesy, John and his petulant attendants could not resist the temptation of pulling the long beards of the Irish chieftains; a conduct which, as might have been expected, was highly resented by these insulted dignitaries, and produced fatal consequences to the English domination in Ireland. It is necessary to keep these inconsistencies of John’s character in view, that the reader may understand his conduct during the present evening.