"While Krsna and Balarama were passing in this way, They saw a washerman and dyer of clothing. Krsna was pleased to ask him for some nice clothing. He also promised that if the washerman would deliver the nicest dyed cloth to Him, he would be very happy, and all good fortune would be his. Krsna was neither a beggar, nor was He in need of clothing, but by this request He indicated that everyone should be ready to offer Krsna whatever He wants. That is the purpose of Krsna consciousness.
Unfortunately this washerman was a servant of Kamsa and therefore could not appreciate the demand of Lord Krsna, the Supreme Personality of Godhead. This is the effect of bad association. He could have immediately delivered the clothing to the Supreme Personality of Godhead, who promised him all good fortune, but being a servant of Kamsa, the sinful demon could not accept the offer. Instead of being pleased, he was very angry and refused the Lord's request saying, "How is it that You are asking clothing which is meant for the King?" The washerman then began to instruct Krsna and Balarama: "My dear boys, in the future don't be so impudent as to ask for things which belong to the King. Otherwise, You will be punished by the government men. They will arrest You and punish You, and You will be in difficulty. I have practical experience of this fact. Anyone who unlawfully wants to use the King's property is very severely punished."
On hearing this, Lord Krsna, the son of Devaki, became very angry at the washerman, and striking him with the upper portion of His hand, He separated the man's head from his body. The washerman fell down dead on the ground. In this way Lord Krsna confirmed the statement that every limb of His body is capable of doing everything He likes. Without a sword, but simply with His hand, He cut off the head of the washerman. This is proof that the Supreme Lord is omnipotent. If He wants to do something, He can do it without extraneous help."
Krsna Book, Chapter 41
Bhaktivedanta Book Trust. Excerpted from text and purport of HDG A.C. Bhaktivedanta Swami Srila Prabhupada.