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: "Whenever Allah bestows a blessing upon a servant and he praises Allah for it, that praise is better than that blessing, however great it may be."
Hadith Referenceالمعجم الكبير للطبراني / باب الصاد / 7763