Augustine of Hippo
Catena Aurea · Matthäusevangelium 13
Hear ye therefore the parable of the sower. When any one heareth the word of the kingdom, and understandeth it not, then cometh the wicked one, and catcheth away that which was sown in his heart. This is he which received seed by the way side. But he that received the seed into stony places, the same is he that heareth the word, and anon with joy receiveth it; Yet hath he not root in himself, but dureth for a while: for when tribulation or persecution ariseth because of the word, by and by he is offended. He also that received seed among the thorns is he that heareth the word; and the care of this world, and the deceitfulness of riches, choke the word, and he becometh unfruitful. But he that received seed into the good ground is he that heareth the word, and understandeth it; which also beareth fruit, and bringeth forth, some an hundredfold, some sixty, some thirty.
(De Civ. Dei, xxi. 27.) Some think that this is to be understood as though the saints according to the degree of their merits delivered some thirty, some sixty, some an hundred persons; and this they usually suppose will happen on the day of judgment, not after the judgment. But when this opinion was observed to encourage men in promising themselves impunity, because that by this means all might attain to deliverance, it was answered, that men ought the rather to live well, that each might be found among those who were to intercede for the liberation of others, lest these should be found to be I so few that they should soon have exhausted the number allotted to them, and thus there would remain many unrescued from torment, among whom might be found all such as in most vain rashness had promised themselves to reap the fruits of others.