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It's open to interpretation. I think it's clear what Jesus was referring to. From Wikipedia. Jesus is quoted in Mark 7:14–23 as saying "There is nothing from without a man, that entering into him can defile him ... whatsoever thing from without entereth into the man, it cannot defile him; because it entereth not into his heart, but into the belly"; and in Matthew 15:10–11. "Not that which goeth into the mouth defileth a man; but that which cometh out of the mouth, this defileth a man." These statements are often cited for support of the view that practicing Christianity does not include dietary restrictions. Supporters of the liberal view also point to Peter's vision reported in Acts 10:10-16 and Acts 11:5-10 in which God invited him to "kill and eat" from the animals in the "great sheet" containing "all manner of four footed beasts of the earth, and wild beasts, and creeping things, and fowls of the air". They also draw support from the writings of apostles Timothy (1 Timothy 4:3–5, "For every creature of God is good, and nothing to be refused, if it be received with thanksgiving; for it is sanctified by the word of God and prayer") and Paul (Colossians 2:8–16, "Let no man therefore judge you in meat, or in drink, or in respect of an holyday, or of the new moon, or of the sabbath days"). While the majority of Christians agree that the dietary restrictions of the Old Testament were lifted with Christ's New Covenant, a view known as Supersessionism, there are Torah-submissive Christians who believe that they should still be observed. Supporters of this view may argue, for example, that in the Old Testament, Daniel spoke of unclean food and drink as "defiling one's body" Daniel 1:8, and that in the New Testament one's body is said to be the "temple of God", and "If anyone defiles the temple of God, God will destroy him".[20] Some read Jesus's reply to questioning by the Pharisees in Matthew 15:1-2 and Matthew 15:19-20 as implying that his statements about "which goeth into the mouth" (Mark 7:14–23 and Matthew 15:10–11) referred to the question of hand washing, rather than clean and unclean foods.[21] Others also argue that the dietary restrictions predate Leviticus, and that Paul in Colossians 2 was referring to the ceremonial feast days such as the Feast of Unleavened Bread and not clean and unclean foods.[22] Others argue that the liberal view would imply the acceptance even of alcohol, tobacco, rats and roaches as "clean food";[23] and that God never declares something an abomination and then changes His mind.[24] Supporters of the stricter view have also disputed the interpretation of Peter's vision Acts 10:5-10, claiming that God was merely instructing him not to refer to gentiles as "unclean" since salvation had been extended to them.[25] This is expressly stated by Peter later in the chapter at Acts 10:28 ("but God hath shewed me that I should not call any man common or unclean.") In Acts 10:14 Peter makes a distinction between "common" (Greek κοινόν) and "unclean" (Greek ακάθαρτον) to which God replies in the next verse "What God hath cleansed, that call not thou common [κοίνου]".