Numbers 24:13
If Balak will give to me his house full of silver and gold, I shall not be able to pass by the mouth of Jehovah, to do good or evil from my heart; what Jehovah shall speak I will speak it
Numbers 16:28
And Moses will say, By this shall ye know that Jehovah sent me to do all these works; for not from my heart
Numbers 22:18
And Balaam will answer, and say to the servants of Balak, If Balak will give to me his house full of silver and gold, I shall not be able to pass over the mouth of Jehovah my God to do little or great
Numbers 22:20
And God will come to Balaam at night, and say to him, If the men have come to call to thee, rise up, go with them, and only the word which I shall speak to thee, thou shalt do it