It is narrated from Hazrat Abu Saeed Khudri (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) said: When thirty sons are born in the lineage of such-and-such person, people will begin to consider Allah's wealth as their own property, they will start interfering in Allah's religion, and they will begin to mock and ridicule Allah's servants.
Hadith Referenceمسند احمد / مسند المكثرين من الصحابة / 11758