Sincerity
Narrated by 'Umar bin Al-Khattab (May Allah be pleased with him): I heard Allah's Messenger (Peace and Blessings be upon him) saying, "The reward of deeds depends upon the intentions and every person will get the reward according to what he has intended. So whoever emigrates for worldly benefits or for a woman to marry, his emigration will be for what he emigrated for." (Saheeh Al-Bukhari)