Luke 5 - How did they know that His Word was the Word of the heavenly Father? 2017

Luke 5:2
and He saw two boats lying at the edge of the lake; but the fishermen had gotten out of them, and were washing their nets.

The multitudes were pressing Him because they wanted to hear the Word of Elohim. The wording of this is very interesting. How did they know that His Word was the Word of Elohim? They knew this because He had already proven that He is the Prophet promised by Elohim in

Deut 18:15-19 “The LORD your God will raise up for you a prophet like me from among you, from your countrymen, you shall listen to him. 16“This is according to all that you asked of the LORD your God in Horeb on the day of the assembly, saying, ‘Let me not hear again the voice of the LORD my God, let me not see this great fire anymore, lest I die.’ 17“And the LORD said to me, ‘They have spoken well. 18‘I will raise up a prophet from among their countrymen like you, and I will put My words in his mouth, and he shall speak to them all that I command him. 19‘And it shall come about that whoever will not listen to My words which he shall speak in My name, I Myself will require it of him.

When He was tempted in the wilderness in the previous chapter.