As long as the rod he beat her with is no thicker than his thumb then he was Sharia compliant!
As Hadith Kutub al-Sittah 3:6 verse 24 states
Beat on your ho’s like you owned dem byatches, Oh brothers! If the ho’s disrepect you, or show disrespect to your crew, let them feel the big-Pappy’s wrath like it come down from Allah himself!