It is narrated from Sayyiduna Abu Umamah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "Allah, the Mighty and Majestic, loves gentleness and is pleased with it, and He gives for it help that He does not give for harshness."
Hadith Referenceالمعجم الكبير للطبراني / باب الصاد / 7446