Sayyiduna Qatadah bin al-Nu'man bin Zayd (may Allah be pleased with him) said: The Messenger of Allah (peace and blessings be upon him) said: "Allah Almighty sent Jibril down to me in the most beautiful form in which he used to come to me, and he said: O Muhammad, al-Salam (Allah) sends you His greeting of peace and says: I have revealed to the world: Become bitter, become murky, become narrow and be harsh upon My friends, so that they love to meet Me; and become easy, become spacious and become pleasant for My enemies, so that they hate to meet Me. For I have made you a prison for My friends and a paradise for My enemies."
Hadith Referenceالمعجم الكبير للطبراني / باب القاف / 16061