"And it is He who created from water a human being," meaning: He created a human from a drop of fluid. "And He made him relative by blood and by marriage."
Muhammad said: Meaning, the kinship of lineage and the kinship of marriage.
﴿وَهُوَ الَّذِي خَلَقَ مِنَ الْمَاءِ بشرا﴾ خَلَقَ مِنَ النُّطْفَةِ إِنْسَانًا ﴿فَجَعَلَهُ نسبا وصهرا﴾.
قَالَ مُحَمَّدٌ: يَعْنِي: قَرَابَةَ النَّسَبِ وقرابة النِّكَاح.