Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him) said, regarding the saying of Allah Almighty: "Sons and hafadah" [Surah al-Nahl: 72]: "Hafadah refers to in-laws, such as sons-in-law."
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 9056