Cross reference
Genesis 18:29
29 And he spake unto him yet again, and said, Peradventure there shall be forty found there. And he said, I will not do it for the forty's sake.
Ephesians 6:18
18 with all prayer and supplication praying at all seasons in the Spirit, and watching thereunto in all perseverance and supplication for all the saints,
Hebrews 4:16
16 Let us therefore draw near with boldness unto the throne of grace, that we may receive mercy, and may find grace to help `us' in time of need.