Charles H. Spurgeon on Psalms 90:10

Threescore years and ten. It may at first seem surprising that Moses should describe the days of man as "Threescore years and ten." But when it is remembered, that, in the second year of the pilgrimage in the wilderness, as related in Nu 14:28-39, God declared that all those who had been recently numbered at Sinai should die in the wilderness, before the expiration of forty years, the lamentation of Moses on the brevity of human life becomes very intelligible and appropriate; and the Psalm itself acquires a solemn and affecting interest, as a penitential confession of the sins which had entailed such melancholy consequences on the Hebrew nation; and as a humble deprecation of God's wrath; and as a funeral dirge upon those whose death had been preannounced by the awful voice of God. —Christopher Wordsworth.