Charles H. Spurgeon on Psalms 90:13

Return, O LORD, how long? Come in mercy, to us again. Do not leave us to perish. Suffer not our lives to be both brief and bitter. Thou hast said to us, "Return, ye children of men", and now we humbly cry to thee, "Return, thou preserver of men." Thy presence alone can reconcile us to this transient existence; turn thou unto us. As sin drives God from us, so repentance cries to the Lord to return to us. When men are under chastisement they are allowed to expostulate, and ask "how long?" Our faith in these times is not too great boldness with God, but too much backwardness in pleading with him. And let it repent thee concerning thy servants. Thus Moses acknowledges the Israelites to be God's servants still. They had rebelled, but they had not utterly forsaken the Lord; they owned their obligations to obey his will, and pleaded them as a reason for pity. Will not a man spare his own servants? Though God smote Israel, yet they were his people, and he had never disowned them, therefore is he entreated to deal favourably with them. If they might not see the promised land, yet he is begged to cheer them on the road with his mercy, and to turn his frown into a smile. The prayer is like others which came from the meek lawgiver when he boldly pleaded with God for the nation; it is Moses like. He here speaks with the Lord as a man speaketh with his friend.