It is narrated from Sayyiduna Shuwayfi' (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) said: "Whoever feels no shame over what he says or what is said to him is not of legitimate birth; his mother did not conceive him in a state of purity."
Hadith Referenceالمعجم الكبير للطبراني / باب الشين / 7205