First Reading: Hebrews 3: 7-14
7 Wherefore, as the Holy Ghost saith: Today if you shall hear his voice,
8 Harden not your hearts, as in the provocation; in the day of temptation in the desert,
9 Where your fathers tempted me, proved and saw my works,
10 Forty years: for which cause I was offended with this generation, and I said: They always err in heart. And they have not known my ways,
11 As I have sworn in my wrath: If they shall enter into my rest.
12 Take heed, brethren, lest perhaps there be in any of you an evil heart of unbelief, to depart from the living God.
13 But exhort one another every day, whilst it is called today, that none of you be hardened through the deceitfulness of sin.
14 For we are made partakers of Christ: yet so, if we hold the beginning of his substance firm unto the end.
Responsorial Psalm: Psalms 95: 6-7c, 8-9, 10-11
6 Come let us adore and fall down: and weep before the Lord that made us.
7 For he is the Lord our God: and we are the people of his pasture and the sheep of his hand.
8 Today if you shall hear his voice, harden not your hearts:
9 As in the provocation, according to the day of temptation in the wilderness: where your fathers tempted me, they proved me, and saw my works.
10 Forty years long was I offended with that generation, and I said: These always err in heart.
11 And these men have not known my ways: so I swore in my wrath that they shall not enter into my rest.
Gospel: Mark 1: 40-45
40 And there came a leper to him, beseeching him, and kneeling down said to him: If thou wilt, thou canst make me clean.
41 And Jesus having compassion on him, stretched forth his hand; and touching him, saith to him: I will. Be thou made clean.
42 And when he had spoken, immediately the leprosy departed from him, and he was made clean.
43 And he strictly charged him, and forthwith sent him away.
44 And he saith to him: See thou tell no one; but go, shew thyself to the high priest, and offer for thy cleansing the things that Moses commanded, for a testimony to them.
45 But he being gone out, began to publish and to blaze abroad the word: so that he could not openly go into the city, but was without in desert places: and they flocked to him from all sides.