The most important commandment of the Torah about the holiday of Sukkot is the order "...take for yourself on the first day of the holiday the fruit of a beautiful tree, palm branches and shoots of a thick-leaved tree and river willows..." (Pentateuch, the book of Vaikra, 23:40).

These four types of plants (arbaa minim) are necessary to fulfill the commandment of Sukhoth – netilat-lulav.

The netilat-lulav commandment is fulfilled standing up. Take the lulav (here and here we will call all three plants: lulav, araba and adac, tied together) in the right hand – so that the zdera is turned to the obeyer of the commandment, and the etrog – to the left – and pronounce the blessing "commanded us to carry out netilat-lulav...."