Yahya bin Abd al-Rahman bin Hatib said that two men made a claim over a child, so Sayyiduna Umar (may Allah be pleased with him) called a physiognomist, who said: Both of them share in him. So Sayyiduna Umar (may Allah be pleased with him) said to him (the child): Take whichever of the two you wish as your guardian.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الدعوى والبينات / 21258