'Cannot' in the Bible

All the offerings of the holy things, which the Israelites offer to the Lord I have given to you and to your sons and your daughters with you as a continual allotment. It is an everlasting covenant of salt [that cannot be dissolved or violated] before the Lord to you and to your descendants with you.”

Balaam answered the servants of Balak, “Even if Balak were to give me his house full of silver and gold, I could not do anything, either small or great, contrary to the command of the Lord my God.

“Behold, I have received His command to bless [Israel].He has blessed, and I cannot reverse it.

‘Even if Balak would give me his house full of silver and gold, I could not go beyond the command of the Lord, to do either good or bad of my own accord. What the Lord speaks, that I will speak?’

everything that can stand fire, you shall pass through fire, and it shall be clean. Nevertheless, it shall also be purified with the water of purification [to remove its impurity]; and all that cannot stand fire [such as fabrics] you shall pass through water.