Hebrews 12:15-17

Moffatt(i) 15 see to it that no one misses the grace of God, that no root of bitterness grows up to be a trouble by contaminating all the rest of you; 16 that no one turns to sexual vice or to a profane life as Esau did — Esau, who for a single meal parted with his birthright. 17 You know how later on, when he wanted to obtain his inheritance of blessing, he was set aside; he got no chance to repent, though he tried for it with tears.