Exodus 4 8
“If they don't believe you and they're not convinced by the first sign, they'll believe because of the second sign,” the Lord explained.
Compare with other 3 random translations
YLT Exodus 4:8' — and it hath come to pass, if they do not give credence to thee, and hearken not to the voice of the first sign, that they have given credence to the voice of the latter sign.
NAS Exodus 4:8“So if they will not believe you nor pay attention to the evidence of the first sign, they may believe the evidence of the last sign.
GW Exodus 4:8⌞Then the Lord said,⌟ “If they won’t believe you or pay attention to the first miraculous sign, they may believe the second.