Musannaf Ibn Abi Shaybah

Hazrat Khalid bin Abi Salat (may Allah have mercy on him) narrates that Hazrat Umar bin Abdul Aziz (may Allah have mercy on him) said to me that Hazrat Umar (may Allah be pleased with him) had given a verdict regarding a child born out of wedlock that he should settle the account of his upbringing with the one who raised him for the service rendered, and whatever remains, he should strive for it himself. And I have given the verdict that he should settle the account for the service rendered, and whatever remains should be paid from the public treasury (Bayt al-Mal).