The Jewish leaders became very angry with Jesus for saying that he was the man who was also God.

John 5:14-18

14 Later, Jesus found the man in the Temple courtyard. He told the man his name, and said to him, “Listen! You are healed! So stop sinning! If you do not stop sinning, something will happen to you that will be worse than the illness you had before!” 15 The man went away and told the Jewish leaders [SYN] that it was Jesus who had healed him. 16 So the Jewish leaders [SYN] started to harass Jesus, because Jesus was doing these things ◄on the Sabbath/on the Jewish rest day►. 17 Then Jesus replied to them, “My Father has always been working every day, including ◄the Sabbath/the day of rest►, up until now. I am doing the same thing!” 18 The Jewish leaders [SYN] considered that he was disobeying their rules about ◄the Sabbath/the day of rest►, and that by saying that God was his Father, he was making himself equal with God. And they considered that both these things were grounds for killing him. So they tried even harder to find a way to kill him.