ח ר' יצחק אומר יש להם על מה שיסמכו שנאמר (שמות לה, ה) כל נדיב לבו חנניה בן אחי רבי יהושע אומר יש להם על מה שיסמכו שנאמר (תהלים קיט, קו) נשבעתי ואקיימה לשמור משפטי צדקך
8 R. Yitzchak says, [Laws of permitting vows] have something to lean on! For it is said, (Exodus 35:5) "Whoever is of a willing heart." [Implying if he becomes unwilling, he may undo his vow]. Chananiah, nephew of R. Yehoshua, says, [Laws of permitting vows] have something to lean on! For it is said, (Psalms 119:106) "I have sworn an oath and confirmed it, to keep your righteous rules." [Implying had He not upheld it, He could have undid the vow.]