מדרש אויף שמואל ב 13:22

Another message to David, I call to You, O Lord, my rock, do not be deaf to me. Do not drag me away with the wicked. Rabbi Abba bar Zerayya said from the gardens of the tribes, You know their praise. It is written (Genesis 37:4), "And they hated him and could not speak peaceably unto him." What was in their heart was on their lips. But further on (2 Samuel 13:22), "But Absalom spake unto Amnon neither good nor bad." What was in their heart was not on their lips. For they do not understand the actions of the Lord. Hezekiah said, "These are the times." Rabbi Yehoshua said, "These are the stories." And the Rabbis said, "This is the recitation of the Shema that we read, 'who creates light and makes darkness, who forms mountains and creates the wind, who brings forth bread from the earth.' Just as God created the two great lights (Genesis 1:16), He will destroy them in this world and will not rebuild them in the world to come."...

“His brothers saw that their father loved him more than all his brothers” – Rabbi Ahava bar Ze’eira said: From the defamation of the tribes you learn their praise. Elsewhere: “Avshalom did not speak to Amnon, either good or bad” (II Samuel 13:22) – what was in his heart remained in his heart; however, here: “And could not speak peaceably to him” – what was in their heart was in their mouth.