Musa bin Anas bin Malik narrates from his father, Sayyiduna Anas bin Malik (may Allah be pleased with him), that he made a bequest during his illness, and he had doubts about the pregnancy of his slave-girl. He said: "If the need arises, call in the physiognomists (qafah)." He said: Then he recovered from that illness. [Sahih. It has preceded.]
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الدعوى والبينات / 21270