VAAK LAINA
Literally: to take (read) a sentence.
In Sikh culture, it means: to seek the Command of God. Every time Guru Granth Sahib is opened, an Ardaas is offered. After the Ardaas one hymn is read at random from Guru Granth Sahib. This is known as ‘Vaak Laina’.
Secondly, when the services (on a particular day) come to an end, an Ardaas is offered. After the Ardaas too, a Vaak is taken.
Thirdly, whenever the Sikhs begin any job, project, or expedition, ‘Vaak Laina’ (to seek the Command of God) is generally performed.
Meaning thereby, every activity must begin after seeking the command/approval of God. This Command is also the blessing of God.
(Dr Harjinder Singh Dilgeer)