Ibn Umar (RA) reported Allah's Apostle (may peace be upon him) as saying: The similitude of a hypocrite is that of a sheep which roams aimlessly between two flocks. She goes to one at one time and to the other at another time. (Muslim Book 38, Number 6696)
Abu Huraira reported Allah's Apostle (may peace be upon him) as saying: Let him be humbled into dust; let him be humbled into dust. It was said: Allah's Messenger, who is he? He said: He who sees either of his parents during their old age or he sees both of them, but he does not enter Paradise. (Muslim Book 32, Number 6189)