Acts 1:3
"To whom also he shewed himself alive after his passion by many infallible proofs, being seen of them forty days, and speaking of the things pertaining to the kingdom of God:"
Cross References (ranked by relevance)
And he was seen many days of them which came up with him from Galilee to Jerusalem, who are his witnesses unto the people.
And after eight days again his disciples were within, and Thomas with them: then came Jesus, the doors being shut, and stood in the midst, and said, Peace be unto you.
After these things Jesus shewed himself again to the disciples at the sea of Tiberias; and on this wise shewed he himself.
This is now the third time that Jesus shewed himself to his disciples, after that he was risen from the dead.
And as they went to tell his disciples, behold, Jesus met them, saying, All hail. And they came and held him by the feet, and worshipped him.
Preaching the kingdom of God, and teaching those things which concern the Lord Jesus Christ, with all confidence, no man forbidding him.
Therefore say I unto you, The kingdom of God shall be taken from you, and given to a nation bringing forth the fruits thereof.
That ye would walk worthy of God, who hath called you unto his kingdom and glory.
Who hath delivered us from the power of darkness, and hath translated us into the kingdom of his dear Son:
For the kingdom of God is not meat and drink; but righteousness, and peace, and joy in the Holy Ghost.
And I fell down before the LORD, as at the first, forty days and forty nights: I did neither eat bread, nor drink water, because of all your sins which ye sinned, in doing wickedly in the sight of the LORD, to provoke him to anger.
And saying, Repent ye: for the kingdom of heaven is at hand.
And when he had fasted forty days and forty nights, he was afterward an hungred.
And he arose, and did eat and drink, and went in the strength of that meat forty days and forty nights unto Horeb the mount of God.
When I was gone up into the mount to receive the tables of stone, even the tables of the covenant which the LORD made with you, then I abode in the mount forty days and forty nights, I neither did eat bread nor drink water: