Is it a good question? You could have better asked a priest or rabbi. Please note that the word is MELAKHAH, not Melekhah.
The basic imperative of the Sabbath is understood from the commandment (Ex. 20:10), ".. but the seventh day is a sabbath of the Lord your God: you shall not do any work ...". The Hebrew word used here is melakhah, and is actually somewhat different in concept from the English word, "work". The prohibition of melakhah is absolutely fundamental to the Sabbath and is repeated many times in the Pentateuch, Prophets, and Hagiographa. Melakhah is best defined as creative activity, and the amount of physical labor involved is not relevant to the determination whether a particular activity is prohibited as melakhah or not. The construction of the Tabernacle in the desert serves as a paradigm of creative activities classed as melakhah. The Talmud lists 39 separate activities undertaken as part of this construction, which are known as the avot melakhot or prototypes of melakhah.