Genesis 35:22 It happened, while Israel lived in that land, that Reuben went and lay with Bilhah, his father's concubine, and Israel heard of it. Now the sons of Jacob were twelve.

WEB_Strongs⁽ⁱ⁾

22 H3478 It happened, while Israel H7931 lived H776 in that land, H7205 that Reuben H3212 went H7901 and lay H1090 with Bilhah, H1 his father's H6370 concubine, H3478 and Israel H8085 heard H1121 of it. Now the sons H3290 of Jacob H8147 were twelve.