Tosefta sur La Genèse 37:25

It happened [once] with Rebbi Tarfon, that he was sitting in the shade of a dovecote, on Shabbat, in the afternoon. They (i.e. the servants) brought in front of him a bucket of cold [water to drink]. Rebbi Tarfon said to his students, “[A person] who drinks water to quench his thirst, what Beracha does he say [before drinking the water]?” They said to him, “Teach us our master.” He said to them, “Borei Nefashot Vechesronan (Who Created Souls and Made Them Lack).” [Then] he said to them, “I will ask [you another question].” They said to him, “Teach us our master.” He said to them, “It says [in the Torah], ‘And they sat down to eat bread, and they lifted up their eyes, and they saw a caravan of Ishmaelites coming from Gilead, and their camels are carrying gum, balsam and resin, transporting them to Egypt.’ (Genesis 37:25) Is not it the way of the Arabs to [usually] carry bad smelling skins and tar? But rather [what happened was that God] placed that righteous man (i.e. Yosef) among favorable things. Is not this a Kal Vechomer (a derivation from minor to major)? Just like at the time when [God] is angry [at] the righteous [people, He still] has mercy on them, then at the time [of God’s] mercy, how much more so.”...