These words of Jesus, given to Saint Faustina, are meant also for us
Divine Mercy in My Soul # 1777
Pray as much as you can for the dying. By your entreaties, obtain for them trust in My mercy, because they have most need of trust, and have it the least. Be assured that the grace of eternal salvation for certain souls in their final moment depends on your prayer. You know the whole abyss of My mercy, so draw upon it for yourself and especially for poor sinners. Sooner would heaven and earth turn into nothingness than would My mercy not embrace a trusting soul.