It says in the gospels Jesus told his disciples not to fast when both Jews and John's disciples were- presumably on Yom Kippur. Jesus seems to have taught against all fasting when he said there is no need for fasting while the bridegroom is present (see also: Thomas). The law says to afflict yourselves on Yom Kippur (in fasting) and that it is the sabbath of sabbaths.
I found what I assume are the Yom Kippur verses, LEVITICUS 23: 26 - 32.
They don't say anything about fasting. They say to make a blood atonement, and do no work, rest and think about your evil.
Is the fasting - tradition of man?
For the Jesus part, - I assume you are talking about Mat 9:14-15? You really need to site the book and verse when you mention them.
You chose a very specific verse. The preceding verse lets us know it was ONLY Jesus' 12 disciples. It mentions a time - he taught 3 1/2 years.
And it obviously doesn't say - "
Jesus seems to have taught against all fasting."
It ends by saying they will start fasting again when he is gone.
Mat 9 14-15 - Then the disciples of John came to him, saying, “Why do we and the Pharisees fast, but your disciples do not fast?” And Jesus said to them, “Can the wedding guests mourn as long as the bridegroom is with them? The days will come when the bridegroom is taken away from them,
and then they will fast.
There are a lot of verses about fasting.
Matthew 6:16-18
“And when you fast, do not look gloomy like the hypocrites, for they disfigure their faces that their fasting may be seen by others. Truly, I say to you, they have received their reward. But when you fast, anoint your head and wash your face, that your fasting may not be seen by others but by your Father who is in secret. And your Father who sees in secret will reward you.
Acts 14:23 And when they had appointed elders for them in every church, with prayer and fasting they committed them to the Lord in whom they had believed.
Joel 2:12 “Yet even now,” declares the Lord, “return to me with all your heart, with fasting, with weeping, and with mourning;
Acts 13:3 Then after fasting and praying they laid their hands on them and sent them off.
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