«من كان يؤمن بالله واليوم الآخر فلا يسق ماءه ولد غيره»
The Prophet (peace and blessings be upon him) said:
"Whoever believes in Allah and the Last Day should not, by having intercourse with a pregnant slave-woman, give his water to another man's child."
Hadith Referenceصحیح الجامع الصغیر / حرف الميم / 6508