Ud'oohum li aabaaa'ihim huwa aqsatu 'indal laah; fa illam ta'lamooo aabaaa'ahum fa ikhwaanukum fid deeni wa mawaaleekum; wa laisa 'alaikum junaahun feemaaa akhtaatum bihee wa laakim maa ta'ammadat quloobukum; wa kaanal laahu Ghafoorar Raheemaa
Call your adopted sons after their true fathers; that is more equitable in the sight of Allah. But if you do not know their true fathers, then regard them as your brethren in faith and as allies. You will not be taken to task for your mistaken utterances, but you will be taken to task for what you say deliberately. Allah is Most Forgiving, Most Compassionate.