‘Truthfulness is righteousness and righteousness leads to Paradise. A person will continue to tell the truth until he is written with Allah as one who tells the truth. Lying is evildoing and evildoing leads to Hell. A person will keep on telling lies until he is written as a liar.’” (Bukhari & Muslim).
‘It is sufficient for a man to be a liar due to his relaying of everything that he hears.’” (Muslim)
Lying in jest is Haram just like all other lies. It was narrated that Ibn ‘Umar, may Allah be pleased with him, said: “The Prophet sallallaahu ‘alaihi wa sallam said: ‘‘I joke, but I speak nothing but the truth.’” (Tabarani).
“Yes, but I only speak the truth.’” (Tirmidhi) .
‘Woe to the one who tells lies make the people laugh, woe to him, woe to him.’” (At-Tirmidhi & Abu Dawood).
It was narrated that ‘Abdullaah ibn ‘Aamir, may Allah be pleased with him, who said: “My mother called me one day when the Messenger of Allah sallallaahu ‘alaihi wa sallam was sitting in our house. She said, ‘Come here, and I will give you (something).’ The Messenger of Allah asked: ‘What do you want to give him?’ She replied: ‘I will give him a date.’ The Messenger of Allah said: ‘If you had not given him anything, you would have been lying.’”
‘Whenever someone says to a child, ‘Come here and I will give you this,’ then does not give him anything, this is counted as a lie.’ (Abu Dawood).
‘Abdur-Rahmaan ibn Abi Laylaa said: “The companions of the Messenger of Allah sallallaahu ‘alaihi wa sallam told us that they were traveling with the Messenger of Allah. A man among them fell asleep and some of them went and took his arrows. When the man woke up, he got alarmed (because his arrows were missing) and the people laughed. The Prophet asked: “What are you laughing at?” They replied: “Nothing, except that we took the arrows and he got alarmed.” The Messenger of Allah said: “It is not permissible for a Muslim to frighten another Muslim.” (Abu Dawood & Ahmad).
Allaah says that which translates as: “So He penalized them with hypocrisy in their hearts until the Day when they will meet Him – because they failed Allah in what they promised Him and because they [habitually] used to lie.” (At-Tawbah: 77).
‘Abdullah ibn Mas’ood, may Allah be pleased with him, said: “It is not correct to tell lies whether in jest or in seriousness,” then he recited the verse of the Qur’aan which translates as: “O you who have believed, fear Allaah and be with those who are true (in words and deeds)” (At-Tawbah:119) .
Abu Bakr As-Siddeeq, may Allah be pleased with him, said: “Beware of lying, for it has nothing to do with faith.”
It was narrated that ‘Umar, may Allah be pleased with him, said: “True faith is not achieved until one gives up lying in jest.”
It was narrated that Sa’d ibn Abi Waqqaas, may Allah be pleased with him, said: “The believer may acquire all sorts of characteristics except treachery and lying.”