'For My Sake' in the Bible

For whoever wishes to save his life [in this world] will [eventually] lose it [through death], but whoever loses his life [in this world] for My sake, he is the one who will save it [from the consequences of sin and separation from God].

and He told them, “Whoever welcomes this child in My name welcomes Me; and whoever welcomes Me [also] welcomes Him who sent Me; for the one who is least among all of you [that is, the one who is genuinely humble—the one with a realistic self-view]—he is the one who is [truly] great.”