2 Kings 2:9

A double portion of thy spirit be upon me - This in reference to the law, Deuteronomy 21:17 ; : He shall acknowledge the first-born, by giving him a Double Portion of all that he hath-the right of the first-born is his. Elisha considered himself the only child or first-born of Elijah, as the disciples of eminent teachers were called their children; so here he claims a double portion of his spiritual influence, any other disciples coming in for a single share only. Sons of the prophets means no more than the disciples or scholars of the prophets. The original words שנים פי pi shenayim , mean rather two parts, than double the quantity.