Abu Sa'id (may Allah be pleased with him) narrated this hadith as marfu‘, he said: "When the son of Adam wakes up in the morning, all the limbs beseech the tongue, saying: 'Fear Allah regarding us (in the matter of protecting our rights), for we are dependent on you; if you are upright, we will also be upright, and if you are crooked, we will also become crooked.'" Its chain is good; narrated by al-Tirmidhi.