Numbers 30:2 When a man vows a vow to Yahweh, or swears an oath to bind his soul with a bond, he shall not break his word; he shall do according to all that proceeds out of his mouth.

WEB_Strongs⁽ⁱ⁾

2 H376 When a man H5087 vows H5088 a vow H3068 to Yahweh, H7650 or swears H7621 an oath H631 to bind H5315 his soul H632 with a bond, H2490 he shall not break H1697 his word; H6213 he shall do H3318 according to all that proceeds H6310 out of his mouth.