Rashi on Numbers 6:25/רש"י על במדבר ו׳:כ״ה

1יאר ה' פניו אליך THE LORD MAKE HIS FACE SHINE UPON THEE — i.e. May He show thee a friendly (more lit., smiling) countenance — a beaming countenance.

2ויחנך means, May He grant thee good favour (חן) (Sifrei Bamidbar 41).