Silsilat al-Ahadith al-Sahihah

It is narrated from Sayyiduna Abdullah bin Umar (may Allah be pleased with him) that the Noble Prophet (peace and blessings be upon him) said: "Indeed, Allah strongly dislikes among people the one who is eloquent in a boastful manner, who (while speaking with affectation and pretension) repeatedly moves his tongue like a cow chews its cud."