The fourteenth year, as in Genesis 14:5, signifies the first temptation of the Lord in childhood. Fourteen, as in Genesis 31:40, signifies a first period of time.

(Riferimenti: Arcana Coelestia 4177)

4177. 'Fourteen years for your two daughters' means the first period, the purpose of which was that He might acquire to Himself the affections for truth. This is clear from the meaning of 'fourteen', or two 'weeks', as the first period (for the expression 'weeks' in the Word means nothing else than a whole period, long or short, see 2044, 3845; and when 'two weeks' are referred to as a single period the same applies, since the doubling and the squaring of a number does not alter the meaning. From this it is evident what 'fourteen' or two 'weeks' means here); and from the meaning of 'two daughters', who in this case are Rachel and Leah, as affections for truth, dealt with in 3758, 3782, 3793, 3819, and in addition in 2362, where the meaning of 'daughters' as affections is dealt with.