‘Abdullah ibn ‘Umar, May Allah be pleased with him, said:
“By Allah, if I fasted all day without eating, prayed all night without sleeping, spent all of my wealth in the Path of Allah, died the day I died, but had no love in my heart for those who obey Allah, and no distaste in my heart for those who disobey Allah, none of this would benefit me in the least.”
{Ihya Ulum ad-Din ~ The Revival of the Islamic Sciences, 2/195}